Question

calcule as expressões algébricas:

Answer 1

Resposta:

a) x=4

b) x=7

c) x=3

d) x=2

e) x=2

f) x=5

g) x=9

Explicação passo-a-passo:

a) 6x = 2x + 16

6x - 2x = 16

4x = 16

x = 16 : 4

x = 4

b) 2x - 5 = x + 2

2x - x = 2 + 5

x = 7

c) 2x + 3 = x + 6

2x - x = 6 - 3

x = 3

d) 5x + 7 = 3x + 11

5x - 3x = 11 - 7

2x = 4

x = 4 : 2

x = 2

e) 15x - 2x = x + 24

15x - 2x - x = 24

13x - x = 24

12x = 24

x = 24 : 12

x = 2

f) 2x - 4 = 16 - 2x

2x + 2x = 16 + 4

4x = 20

x = 20 : 4

x = 5

g) 5x + 10 = 10x - 35

5x - 10x = - 35 - 10

- 10x = - 45

x = (- 45) : ( - 10)

x = 9