Question

Determine o valor de X


X/8=5/1

Answer 1

regra de três simples:
x/8=5/1 multiplicando em cruz:
x=8.5
x=40

Answer 2

x/8 = 5/1

mmc de 1 e 8 = 8
8/8 = 1
1 . x = x
8/1 = 8
8.5 = 40
x/8 = 5/1
x/8 = 40/8
x = 8 . 40/8
x = 40   ok