12=A-7.9Rewrite the equation as A-7.9=12.A-7.9=12Move all terms not containing A to the right side of the equation.Tap for more steps…Add 7.9 to both sides of the equation.A=12+7.9Add 12 and 7.9.A=19.9A=19.9 Solve for A 12=A-7.9 Solving MATH problems We can solve all math problems. Get help on the web or with our math app