Question

Resolva a equação |4x – 6 |= |3x + 2| * 2 pontos a) S = {8 , - 4/7} b) S = {8 , 4/7} c) S = {4/7, 8 } d) S = {- 8 , 4/7}

Answer 1

A = B

| 4x - 6| = |3.x + 2|

4.x - 6 = 3.x + 2

4.x - 3.x = 2 + 6

1.x = 8

x = 8

A = - B

4.x - 6 = - ( 3.x + 2 )

4.x - 6 = -3.x - 2

4.x + 3.x = -2 + 6

7.x = 4

x = $\frac{4}{7}$

S { 8 , $\frac{4}{7}$ }

alternativa b)