Unknown number 5

Daniel think an integer. When he change this number at a ratio of 2:5 he got number 2.8. Determine what number think Daniel.

Result

x =  7

Solution:


x*2/5= 2.8

2x = 14

x = 7

Calculated by our simple equation calculator.



Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!





Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!
avatar




Tips to related online calculators
Need help calculate sum, simplify or multiply fractions? Try our fraction calculator.
Check out our ratio calculator.
Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

Next similar math problems:

  1. Unknown number
    zlomky_19 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.
  2. Find unknown
    eq222_26 Find unknown numerator: 4/8 + _/8 = 1
  3. Find x
    eq222_23 Solve: if 2(x-1)=14, then x= (solve an equation with one unknown)
  4. Dropped sheets
    books_26 Three consecutive sheets dropped from the book. The sum of the numbers on the pages of the dropped sheets is 273. What number has the last page of the dropped sheets?
  5. Simple equation 5
    eq222_17 Solve equation with fractions: X × 3/8 = 1/2
  6. Norm
    rajcata Three workers planted 3555 seedlings of tomatoes in one dey. First worked at the standard norm, the second planted 120 seedlings more and the third 135 seedlings more than the first worker. How many seedlings were standard norm?
  7. Simple equation 9
    eq2 Solve the following equation: -8y+5=-9y+9
  8. Equation
    fractions Find x: x + 1/2 = 1/3
  9. Write 2
    fractions_12 Write 791 thousandths as fraction in expanded form.
  10. Cupcakes 2
    cake_4 Susi has 25 cupcakes. She gives 4/5. How much does she have left?
  11. Report 2
    skola_4 A School reports students to teacher ratio of 6:1. If there are 45 teachers in the School, how many students are there?
  12. Equation 29
    eq222_18 Solve next equation: 2 ( 2x + 3 ) = 8 ( 1 - x) -5 ( x -2 )
  13. Divide money
    zlomky Divide 1200 USD at a ratio of 1:2:3:4:5:6:9:10
  14. Equation 15
    eq222_4 Solve equation with variables on both sides:
  15. In fractions
    ant An ant climbs 2/5 of the pole on the first hour and climbs 1/4 of the pole on the next hour. What part of the pole does the ant climb in two hours?
  16. Withdrawal
    penize_13 If I withdrew 2/5 of my total savings and spent 7/10 of that amount. What fraction do I have in left in my savings?
  17. Fraction and a decimal
    numbs_11 Write as a fraction and a decimal. One and two plus three and five hundredths