Question

a razao entre dois numeros e 1/3 e a sua soma e 40. Calcule os numeros.

Answer 1

x / y = 1 / 3
x + y = 40

x / y = 1 / 3
x = 40 - y

40 - y / y = 1 / 3
40 - y / 1= y/ 3

40-y/1 - y/3 = 0

120-3y/3 - y/3 = 0
120-3y - y = 0
-4y+120 = 0
-4y = -120x
4y = 120
y = 120/4
y = 30

x + 30 = 40
x = 40 -30
x = 10

x = 10 e y = 30