Solve for x
x=72
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552-3x+168=7x
Multiply both sides of the equation by 21, the least common multiple of 7,3.
720-3x=7x
Add 552 and 168 to get 720.
720-3x-7x=0
Subtract 7x from both sides.
720-10x=0
Combine -3x and -7x to get -10x.
-10x=-720
Subtract 720 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-720}{-10}
Divide both sides by -10.
x=72
Divide -720 by -10 to get 72.
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