One Step Equation with Addition and Subtraction

Why do you add 7 to both sides?

• To undo addition, you subtract.

• To balance the equation, you subtract 7 on both sides.

• To undo subtraction, you add.

• To balance the equation,you add 7 to both sides.

Why do you subtract 14?

• To undo addition, you subtract.

• To balance the equation, you subtract 14 on both sides.

• To undo subtraction, you add.

• To balance the equation,you add 14 to both sides.

Why do you subtract 14 on both sides?

• To undo addition, you subtract.

• To balance the equation, you subtract 14 on both sides.

• To undo subtraction, you add.

• To balance the equation,you add 14 to both sides.

How do you solve this equation?

• add 7 to both sides

• add 10 to both sides

• subtract 7 from both sides

• subtract 10 from both sides

Solve the equation.

x + 9 = -5

Mathematical Equivalence

OFF

3c + 5 = 23

4x + 7 = 23

Solve this equation.

• t = 7

• t = 10

• t = 17

• t = 3

Why do you add 7?

• To undo addition, you subtract.

• To balance the equation, you subtract 7 on both sides.

• To undo subtraction, you add.

• To balance the equation,you add 7 to both sides.

Why do you add 33 to both sides?

• To undo addition, you subtract.

• To balance the equation, you subtract 33 on both sides.

• To undo subtraction, you add.

• To balance the equation,you add 33 to both sides.