Solve for a
a = \frac{3}{2} = 1\frac{1}{2} = 1.5
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2+1=2a
Variable a cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 2a, the least common multiple of a,2a.
3=2a
Add 2 and 1 to get 3.
2a=3
Swap sides so that all variable terms are on the left hand side.
a=\frac{3}{2}
Divide both sides by 2.
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