Question

Expressão Algébrica


a) x - 39 = - 79



b) 15 =x + 20



c) 7 = x + 8


d) 7 x - 33 = - 12

Answer 1

Resposta:

a)x-39=-79

x=-79+39

x=-40

b)15=x+20

x+20=15

x=15-20

x=-5

c)7=x+8

x+8=7

x=7-8

x=-1

d)7x-33=-12

7x=-12+33

7x=21

x=21/7

x=3