Solve for x
x=15
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3\times 15-15=2x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 3x, the least common multiple of x,3x,3.
45-15=2x
Multiply 3 and 15 to get 45.
30=2x
Subtract 15 from 45 to get 30.
2x=30
Swap sides so that all variable terms are on the left hand side.
x=\frac{30}{2}
Divide both sides by 2.
x=15
Divide 30 by 2 to get 15.
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