Question

nao entendi essa questao de matematica(adiçao e subtraçao de numeros racionais)

Answer 1

Resposta:

Chame o espaço em branco de x.

a) 12/15 + x = 6/15

x = 6/15 - 12/15

x = -6/15

b) x - 1/10 = 4/10

x = 4/10 + 1/10

x = 5/10

c) -3/4 + x = -4/8

x = -4/8 + 3/4

x = -4/8 + 6/8

x = 2/8

d) x + 3/5 = 4/15

x = 4/15 - 3/5

x = 4/15 - 9/15

x = -5/15