Answer
$$b=-\frac{19}{3},\:a=-\frac{4}{3}$$
Work Step by Step
Solving the two equations using substitution, we find:
$$ 4\left(5+b\right)=b+1\\ b=-\frac{19}{3} \\ a=5-\frac{19}{3}\\ a=-\frac{4}{3}$$
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