Question

a) 9
b) 8
c) 7
d) 6
e) 5

Answer 1

Explicação passo-a-passo:

x+1 -3+x

-2-3 -1+2

x+1 -3+x

-5 +1

1.(x+1) - (-5).(-3+x)= 40

x+1 - ( +15 - 5x) = 40

x+1 - 15 + 5x = 40

6x - 14 = 40

6x = 40 +14

6x = 54

x= 54/6

x= 9