Respuesta :

4x - 12 = 16) 4x -12 + 12 = 16 + 12) 4x = 28) 4x/4 =28/4) x = 7
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Answer:

x=7

Step-by-step explanation:

You multiply the 2 with what is inside of the parenthesis so 3x-12

x+3x-12=16

then you add x +3x =4x

4x-12=16

then you add 12 to both sides

4x=28

then you divide by 4 on both sides

x=7