Solve for a
a = -\frac{15}{2} = -7\frac{1}{2} = -7.5
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a=3\left(a+5\right)
Variable a cannot be equal to -5 since division by zero is not defined. Multiply both sides of the equation by a+5.
a=3a+15
Use the distributive property to multiply 3 by a+5.
a-3a=15
Subtract 3a from both sides.
-2a=15
Combine a and -3a to get -2a.
a=\frac{15}{-2}
Divide both sides by -2.
a=-\frac{15}{2}
Fraction \frac{15}{-2} can be rewritten as -\frac{15}{2} by extracting the negative sign.
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