Younger 7033

Cyril was four times less than Dalibor 3 years ago. How many years will Cyril be 2x less if he is 3x younger now?

Correct answer:

x =  9

Step-by-step explanation:


(c-3) = (d-3)/4
c = d/3
(c+x) = (d+x)/2

4c-d = 9
3c-d = 0
2c-d+x = 0

Row 2 - 3/4 · Row 1 → Row 2
4c-d = 9
-0.25d = -6.75
2c-d+x = 0

Row 3 - 2/4 · Row 1 → Row 3
4c-d = 9
-0.25d = -6.75
-0.5d+x = -4.5

Pivot: Row 2 ↔ Row 3
4c-d = 9
-0.5d+x = -4.5
-0.25d = -6.75

Row 3 - -0.25/-0.5 · Row 2 → Row 3
4c-d = 9
-0.5d+x = -4.5
-0.5x = -4.5


x = -4.5/-0.5 = 9
d = -4.5-x/-0.5 = -4.5-9/-0.5 = 27
c = 9+d/4 = 9+27/4 = 9

c = 9
d = 27
x = 9

Our linear equations calculator calculates it.



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







Tips for related online calculators
Do you have a system of equations and looking for calculator system of linear equations?
Do you want to convert time units like minutes to seconds?

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

Related math problems and questions: