Rewrite the equation as 2a-3=-7.
Move all terms not containing a to the right side of the equation.
Add 3 to both sides of the equation.
Add -7 and 3.
Divide each term by 2 and simplify.
Divide each term in 2a=-4 by 2.
Cancel the common factor of 2.
Cancel the common factor.
Divide a by 1.
Divide -4 by 2.
Solve for a -7=2a-3