Solve for a
a=-\frac{1}{2}=-0.5
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-\frac{1}{4}a-4-\frac{7}{4}a=-3
Subtract \frac{7}{4}a from both sides.
-2a-4=-3
Combine -\frac{1}{4}a and -\frac{7}{4}a to get -2a.
-2a=-3+4
Add 4 to both sides.
-2a=1
Add -3 and 4 to get 1.
a=\frac{1}{-2}
Divide both sides by -2.
a=-\frac{1}{2}
Fraction \frac{1}{-2} can be rewritten as -\frac{1}{2} by extracting the negative sign.
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