Question

RESOLVA AS EQUAÇÕES:É PRA HJ


A)x-3=9



B)4X-9=1-2X



C)X-5=20-4X


D)9x-4x+10=7x-30





​

Answer 1

Resposta:

a) x = 12

b) 5

3

c) x = 5

d) x = 20

Explicação passo-a-passo:

a) x - 3 = 9

x = 9 + 3

x = 12

b) 4 x - 9 = 1 - 2x

4x + 2x = 1 - 9

6x = 10

x = 5

3

c) x - 5 = 20 - 4x

x - 4x = 20 + 15

5x = 25

x = 5

d) 9x - 4x + 10 = 7x - 30

5x + 10 = 7x - 30

5x - 7x = - 30 - 10

- 2x = - 40

x = 20