Question

Resolva as equações: a) 4x – 2 = 8 – x b) 3x + 4 = x + 10 c) 2x – 4 = 8 d) 3x – 10 + 13 = -2x + 28 e) 10x – 20 = 40 + 50

Answer 1

Explicação passo-a-passo:

a)

4x - 2 = 8 - x

4x + x = 8 + 2

5x = 10

x = 10/5

x = 2

b)

3x + 4 = x + 10

3x - x = 10 - 4

2x = 6

x = 6/2

x = 3

c)

2x - 4 = 8

2x = 8 + 4

2x = 12

x = 12/2

x = 6

d)

3x - 10 + 13 = -2x + 28

3x + 3 = -2x + 28

3x + 2x = 28 - 3

5x = 25

x = 25/5

x = 5

e)

10x - 20 = 40 + 50

10x - 20 = 90

10x = 90 + 20

10x = 110

x = 110/10

x = 11