Solve for x
x=12
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3x-9=x+15
Use the distributive property to multiply 3 by x-3.
3x-9-x=15
Subtract x from both sides.
2x-9=15
Combine 3x and -x to get 2x.
2x=15+9
Add 9 to both sides.
2x=24
Add 15 and 9 to get 24.
x=\frac{24}{2}
Divide both sides by 2.
x=12
Divide 24 by 2 to get 12.
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