a=6, b=2
Explanation:
Use simplification into substitution



We can now plug this value of a into the second equation.

Get rid of fractions in the numerators and/or denominators

Then we can match the denominators

Combine

Divide both sides by three

Get rid of fractions

Single out b


Now we can plug it into the equation



Now we can check it;

↑CORRECT

↑CORRECT