Solve for x
x=6
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x-3=21-3x
Use the distributive property to multiply 3 by 7-x.
x-3+3x=21
Add 3x to both sides.
4x-3=21
Combine x and 3x to get 4x.
4x=21+3
Add 3 to both sides.
4x=24
Add 21 and 3 to get 24.
x=\frac{24}{4}
Divide both sides by 4.
x=6
Divide 24 by 4 to get 6.
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