Solve for a
a=4
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\frac{3}{4}a-4-\frac{1}{4}a=-2
Subtract \frac{1}{4}a from both sides.
\frac{1}{2}a-4=-2
Combine \frac{3}{4}a and -\frac{1}{4}a to get \frac{1}{2}a.
\frac{1}{2}a=-2+4
Add 4 to both sides.
\frac{1}{2}a=2
Add -2 and 4 to get 2.
a=2\times 2
Multiply both sides by 2, the reciprocal of \frac{1}{2}.
a=4
Multiply 2 and 2 to get 4.
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Limits
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