Question

C 2 [x-3] = -3 [x - 3] e D 6X + 6 = 42

Answer 1

2(x - 3) = - 3(x - 3)
2x - 6 = - 3x + 9
2x + 3x = 9 + 6
5x = 15
x = 15/5
x = 3

6x + 6 = 42
6x = 42 - 6
6x = 36
x = 36/6
x = 6

Answer 2

Ola Marcos

2*(x - 3) = 2x - 6
-3*(x - 3) = -3x + 9

-3x + 9 = 2x - 6
-3x -2x = -6 - 9
-5x = -15
x = -15/-5 = 3

6x + 6 = 42
6x = 42 - 6 = 36
x = 36/6 = 6 

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