Question

resolva as seguintes proporçôes

Answer 1

a) 10 / 7 = 50 / x
10*x = 50*7
10x = 350
x = 350 / 10
x = 35

b) 5 / x + 4 = 30 / 54
(x + 4)*30 = 5*54
30x + 120 = 270
30x = 270 - 120
30x = 150
x = 150 / 30
x = 5