One Step Equation Addition

r + 20 = 27

• r = 7

• r = 47

• r = 13

• r = 20

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.

How do you solve this equation?

• add 21 to both sides

• add 6 to both sides

• subtract 21 from both sides

• subtract 6 from both sides

g - 15 = 30

• g = 35

• g = 45

• g = 15

• g = 12

Solve the equation: 
x + 7 = 12

• x = 5

• x = 19

• x = -5

• x = 84

x+5 = 15

• 20

• 10

• 3

• 25

Solve the equation.

4x + 6 = 30

• 7

• 34

• 9

• 6

    2x + 6 = 14

4x + 7 = 23

3c + 5 = 23