Question

RESOLVA as equações:
a) 3x-6 = 2x-6
b) 4x+4 -1 = 3x+12
c) 5x – 10 = 5
d) 7x- 5 = 2x-8

Answer 1

Resposta:

a)

$\sf 3x-6 = 2x-6$

$\sf 3x - 2x = - 6 - 6$

$\boxed{ \boxed { \boldsymbol{ \sf \displaystyle x= -\: 12 }}} \quad \gets \mathbf{ Resposta }$

b)

$\sf 4x+4 -1 = 3x+12$

$\sf 4x - 3x = 12 + 1 - 4$

$\sf x = 13 - 4$

$\boxed{ \boxed { \boldsymbol{ \sf \displaystyle x = 9 }}} \quad \gets \mathbf{ Resposta }$

c)

$\sf 5x - 10 = 5$

$\sf 5x = 5 + 10$

$\sf 5x = 15$

$\sf x = \dfrac{15}{5}$

$\boxed{ \boxed { \boldsymbol{ \sf \displaystyle x = 3 }}} \quad \gets \mathbf{ Resposta }$

d)

$\sf 7x- 5 = 2x-8$

$\sf 7x -2x = - 8 + 5$

$\sf 5x = -\:3$

$\boxed{ \boxed { \boldsymbol{ \sf \displaystyle x = -\: \dfrac{3}{5} }}} \quad \gets \mathbf{ Resposta }$

Explicação passo-a-passo: