Question

2- Resolva as equações:
a) 7x + 10 = 2x +49




b) 8x + 24 = 6x -16

c) 9x - 16 = 5x + 48

d) 9x - 18 = 6x - 45





4x - 15 = x -36
9x + 28 = 2x +14

Answer 1

Explicação passo-a-passo:

a) 7x + 10 = 2x + 49

7x - 2x = 49 - 10

5x = 39

x = 39/5

b) 8x + 24 = 6x - 16

8x - 6x = -16 - 24

2x = -40

x = -40 ÷ 2

x = -20

c) 9x - 16 = 5x + 48

9x - 5x = 48 + 16

4x = 64

x = 64 ÷ 4

x = 16

d) 9x - 18 = 6x - 45

9x - 6x = -45 + 18

3x = -27

x = -27 ÷ 3

x = -9

4x - 15 = x - 36

4x - x = -36 + 15

3x = -21

x = -21 ÷ 3

x = -7

9x + 28 = 2x + 14

9x - 2x = 14 - 28

7x = -14

x = -14 ÷ 7

x = -2