Question

Christopher is 4 times as old as Michael. Ten years ago, Christopher was 9 times as old as Michael.How old is Christopher now?

Answer 1

Let the present age of Christopher and Michael be x and y then,
x=4y ........i
x-10 = 9(y-10) .....ii

Answer 2

Solve that two equations

Answer 3

for x in the second equation do I put 4y? so the equation would look like 4y-10=9(y-10) ?

Answer 4

Yep....... Now solve for y

Answer 5

okay

Answer 6

Then plug the value of y u get in eqn i to find x

Answer 7

when i was solving the equation with the y i distributed and got 4y-10=9y-90

Answer 8

then after that i added 9y to 4y

Answer 9

and got 13y

Answer 10

4y-10=9y-90
-10+90=9y-4y

Answer 11

got your mistake?

Answer 12

ohhh

Answer 13

yes i did

Answer 14

So, what is the value of y

Answer 15

16?

Answer 16

YES

Answer 17

Now what is the value of x then

Answer 18

64?

Answer 19

Very correct

Answer 20

okay :) thank you

Answer 21

WELCOME