Question

calcule o valor de x e y

x/y = 3/4, sabendo-se x+y=35

Answer 1

( x + y ) / x = ( 3 + 4 ) / 3
35 / x = 7 / 3
7x = 105
x = 105 / 7
x = 15

x + y = 35
15 + y = 35
y = 35 - 15
y = 20