Jean, Pierre et Rachel sont des amis. Pierre est 8 ans plus vieux que Rachel, alors que Jean a 15 ans de moins que le double de l’âge de Pierre. De plus, la somme de l’âge de Pierre et du quart de l'âge de Rachel est égal à
l'âge de Jean moins 5. Détermine quels sont les âges de chacun.

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

72 is the answer to this problem

it is x equals 3   plese mark me really need it

step-by-step explanation: