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4x-6=15-3x
Use the distributive property to multiply 3 by 5-x.
4x-6+3x=15
Add 3x to both sides.
7x-6=15
Combine 4x and 3x to get 7x.
7x=15+6
Add 6 to both sides.
7x=21
Add 15 and 6 to get 21.
x=\frac{21}{7}
Divide both sides by 7.
x=3
Divide 21 by 7 to get 3.