Question

calcule o valor de x e y sabendo que x-y= 15 x/y=5/2

Answer 1

x-y= 15----->x=15+y
x/y= 5/2

x/y=5/2
15+y/y=5/2
30+2y/2y=5y/2y
30+2y=5y
3y=30
y=10

x-y=15
x-10=15
x=25