Question

RESOLVA AS EQUAÇOES: A) 7x-4=5x b)5(1-x)-2x+1=-3(2+x) c)4x=-14x+36 d) 3(x-3) =2x-5

Answer 1

Resposta:

a) x = 2

b) x = 3

c) x = 2

d) x = 4

Explicação passo-a-passo:

a) 7x - 4 = 5x

7x - 5x = 4

2x = 4

x = 4/2

x = 2

b) 5 ( 1 - x ) - 2x + 1 = - 3 ( 2 + x )

5 - 5x - 2x + 1 = - 6 - 3x

- 7x + 6 = - 6 - 3x

- 7x + 3x = - 6 - 6

- 4x = - 12 multiplica por (-1) pra ficar com "x" positivo

4x = 12

x = 12/4

x = 3

c) 4x = - 14x + 36

4x + 14x = 36

18x = 36

x = 36/18

x = 2

d) 3 ( x - 3 ) = 2x - 5

3x - 9 = 2x - 5

3x - 2x = - 5 + 9

x = 4