Large family

I have as many brothers as sisters, and each of my brothers has twice as many sisters as brothers. How many children do parents have?

Correct answer:

n =  7

Step-by-step explanation:


n = m+z
m -1 = z
2(z - 1) = m

n = m+z
m -1 = z
2•(z - 1) = m

m-n+z = 0
m-z = 1
m-2z = -2

m = 4
n = 7
z = 3

Our linear equations calculator calculates it.



Did you find an error or inaccuracy? Feel free to write us. Thank you!



avatar




Tips to related online calculators
Do you have a linear equation or system of equations and looking for its solution? Or do you have a quadratic equation?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions:

  • Brothers and sisters
    family Lenka has as many brothers as sisters. Her brothers have twice as many sisters as brothers. How many brothers and sisters are in the family?
  • Family
    family Martin has just as brothers as sisters. His sister Jana but has 2 times more brothers than sisters. a) How many children are in this family? b) How many boys and how many girls are in the family?
  • Large family
    family The average age of all family members (children, mother, father, grandmother, grandfather) is 29 years. The average age of parents is 40 years, grandparents 66 years and all children are 5 years. How many children are there in this family?
  • Two sisters
    cd_disc Two sisters together have 54 CDs. 6/8 CDs has younger sister and is equal to 3/5 of CDs older sisters. How many CDs has each of the sisters?
  • Family
    bigfamily A man and a woman have 6 daughters together (or - "with each-other" so that step-children are excluded). Each daughter has one brother. How many members are in the immediate family?
  • Sweets, candy
    bonbons Grandfather gave out sweets to four children. At the last moment, two more children came, so in order to have them all the same, each of the four children would receive four candies less than they would have received if they had not. How much did my grand
  • Brothers and sisters
    venn_intersect There are 35 children in the class, 23 of them have a brother, and 27 of them have a sister. How many children have both a brother and a sister when there are 5 children in the class who have no brother or sister?
  • Quarantine cupcakes
    cake Mr. Honse was baking quarantine cupcakes. Mrs. Carr made twice as many as Mr. Honse. Ms. Sanchez made 12 cupcakes, more than Mr. Honse. If they put all their cupcakes together (which they can't because. .. quarantine!), they would have 108 cupcakes. How m
  • Age
    age In 1960 my age was equal to the digits sum of the year of my birth. What is my age now?
  • Balls
    kulicky Michal said to Martin: give me one ball, and I'll have twice as you. Martin said: give me 4, and we will have equally. How many balls each have?
  • Pears and oranges
    hrusky There are 3 times as many pears as oranges. If a group of children receives 5 oranges each, there will be no oranges left over. If the same group of children receives 8 pears each, there will be 21 pears leftover. How many children and oranges are there?
  • Families
    family2 In the class, we investigated how many children have families in which they live. How many % of pupils live in families with more than two children? If five families have one child in 9 families, have 2 children, in 5 families have 3 children, in 2 famili
  • Tickets 4
    cinema2 Stacey is selling tickets to the school play. The tickets are $7 for adults and $5 for children. She sells twice as many adult tickets as children's tickets and brings in a total of $342. How many of each kind of ticket did she sell?
  • When I
    age When I am as old as my older brother is today, my brother will be twice as old as I am today. a) How old is my brother if I am 8 years old today? b) How old am I if my brother is 21 today?
  • Stones 3
    stones Simiyu and Nasike each collected a number of stones in an arithmetic lesson. If Simiyu gave Nasike 5 stones, Nasike would have twice as many stones as Simiyu. If initially, Simiyu had five stones less than Nasike how many stones did each have?
  • Circus
    cirkus On the circus performance was 150 people. Men were 10 less than women and children 50 more than adults. How many children were in the circus?
  • Two houses
    house There are twice as many people living in the first house as in the second house. Altogether, there are 81 of them living in both. How many people live in each house?