Question

Calcule 4x-1+21 e 8x-5+21

Answer 1

Explicação passo-a-passo:

4x-1+21 =

4x = - 21+1

4x = - 20

x = 20/4

x = 5

8x-5+21 =

8x = - 21+5

8x = - 16

x = - 16/8

x = - 2