Equations

Solving Equations Using Addition and Subtraction

Background Knowledge

Addition Property of Equality: If you add a value to one side, you must add the same value to the other side to keep the equation balanced.

If a = b, then a + c = b + c

Subtraction Property of Equality: If you subtract a value from one side, you must subtract the same value from the other side to keep the equation balanced.

If a = b, then a - c = b - c

Isolate: Remain alone or apart from others.

Solving Equations Using Multiplication or Division

Background Knowledge

Multiplication Property of Equality: If you multiply one side by a number, you must multiply the other side by the same number to keep the equation balanced.

If a = b, then ac = bc

Division Property of Equality: If you divide one side by a number, you must divide the other side by the same number to keep the equation balanced.

If a = b, then a/c = b/c

Solving 2-Step Equations

Background Knowledge