Answer:
x=3
Step-by-step explanation:
1) Expand.
4x+12=9x-34x+12=9x−3
2) Subtract 4x4x from both sides.
12=9x-3-4x12=9x−3−4x
3) Simplify 9x-3-4x9x−3−4x to 5x-35x−3.
12=5x-312=5x−3
4) Add 33 to both sides.
12+3=5x12+3=5x
5) Simplify 12+312+3 to 1515.
15=5x15=5x
6) Divide both sides by 55.
\frac{15}{5}=x
5
)
15
=x
7) Simplify \frac{15}{5}
5
15
to 33.
3=x3=x
8) Switch sides.
x=3
