Subtract 2a from 5a.
Move all terms not containing a to the right side of the equation.
Subtract 8 from both sides of the equation.
Subtract 8 from -7.
Divide each term by 3 and simplify.
Divide each term in 3a=-15 by 3.
Cancel the common factor of 3.
Cancel the common factor.
Divide a by 1.
Divide -15 by 3.
Solve for a 5a+8+(-2a)=-7