Solve for x
x = \frac{63}{20} = 3\frac{3}{20} = 3.15
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3\times 10x-10x=63
Multiply both sides of the equation by 21, the least common multiple of 7,21.
30x-10x=63
Multiply 3 and 10 to get 30.
20x=63
Combine 30x and -10x to get 20x.
x=\frac{63}{20}
Divide both sides by 20.
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