You need to isolate a on one side of the equation and b on the other side.
Combine 5a and -3a to get 2a.
Subtract 2a from both sides of the equation.
Combine 3a and −2a to get a.
Subtract 4b from both sides of the equation.
Combine -6b and -4b to get -10b.
Therefore, the solution is a = 24 – 10b