Solve for x
x = \frac{15}{2} = 7\frac{1}{2} = 7.5
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15x\times \frac{1}{15}+15=3x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 15x, the least common multiple of 15,x,5.
x+15=3x
Cancel out 15 and 15.
x+15-3x=0
Subtract 3x from both sides.
-2x+15=0
Combine x and -3x to get -2x.
-2x=-15
Subtract 15 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-15}{-2}
Divide both sides by -2.
x=\frac{15}{2}
Fraction \frac{-15}{-2} can be simplified to \frac{15}{2} by removing the negative sign from both the numerator and the denominator.
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