# Equation - 7th grade (12y) - examples - page 23

- Solve 2

Solve integer equation: a +b+c =30 a, b, c = can be odd natural number from this set (1,3,5,7,9,11,13,15) - Bed time

Tiffany was 5 years old; her week night bedtime grew by ¼ hour each year. If, at age 18, her curfew time is 11pm, what was her bed time when she was 5 years old? - Supplementary angles

One of the supplementary angles is larger by 33° than the second one. Calculate the angles size. - Mysterious number

The magician thinks the number: "The mysterious number is first divided by minus five, dividing the result by three, multiplying the number by ten, and dividing the resulting number by minus four. This gives result 5. Can you reveal the mysterious number? - Twenty

Twenty rabbits are put in 4 cells so that there are different number of rabbits in each cell contains at least 3 rabbits. What is the largest possible number of rabbits in one cell - Unknown number

I think the number. I'll reduce it to its one-third. The result is then increased by one-third, and I get the number 12. - A man

A man spends 5/9 of his money on rent, and 5/16 of the remainder on electricity. If the final balance remaining is 550 find how much was spent on rent - Taxi

A taxi ride costs $3 plus $2.50 per mile. Write and Graph an equation in two variables that represents the total cost of a taxi ride. - Find x

Solve: if 2(x-1)=14, then x= (solve an equation with one unknown) - Flour

Kim needs 3/4 cup of flour to make 12 cookies. How much flour would she need to make 60 cookies? - The average

The average of one set of 4 numbers is 35. The average of another set of number is 20. The average of the numbers in the two sets is 30. How many numbers are there in the other set? - A number

A number increased by 7.9 is 8.3 - Boats

Three-quarters of boats are white, 1/7 are blue and 9 are red. How many boats do we have? - Find unknown

Find unknown numerator: 4/8 + _/8 = 1 - The quotient

The quotient of g and 55 is the same as 279. What is g? - Given

Given 2x =0.125 find the value of x - 1.5 divided

1.5 divided by 1 = w divided by 4 - Eqn

Solve equation with fractions: 2x/3-50=40+x/4 - Far country

In a country far away, the value of 3 pesos is 12 centavos more than the value of 1 peso. How many centavos is 1 peso worth?

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