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