Answer
$$b=-\frac{9}{11},\:a=-\frac{3}{11}$$
Work Step by Step
Solving the two equations using substitution, we find:
$$ 4\left(3+4b\right)-5b=3\\ b=-\frac{9}{11}\\ a=3+4\left(-\frac{9}{11}\right)\\ a=-\frac{3}{11}$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.