Question

a) 2x - 10 = 20

b) 12+3x - 2 = 40

c) -4x + 8x = 28+4

d) 2(x-4)=18​

Answer 1

Resposta:

a) 2x - 10 = 20

   2x = 20-10

   2x = 10

    x = 10 ÷ 2

    x = 5

b) 12 + 3x - 2 = 40

   3x = 40 - 12 + 2

   3x = 30

    x = 30 ÷ 3

    x = 10

c) -4x + 8x = 28+4

   4x = 32

    x = 32 ÷ 4

    x = 8

d) 2(x-4) = 18

   2x - 8 = 18

   2x = 18 + 8

   2x = 26

    x = 26 ÷ 2

    x = 13