Two Sided Equations Addition and Subtraction

Solve
34.7 = y + 5.3

• y = 29.4

• y = 30.4

• y = 28.4

• y = 40

Solve
4.7 = y + 1.34

• y = 6.04

• y = 1.81

• y = 3.46

• y = 3.36

Solve
x - 11 = 3

• x = 9

• x =-9

• x = 14

• x = 13

Solve
17 = x - 20

• x = 3

• x = 37

• x = -3

• x = -37

Solve
1.54 = x - 2.9

• x = 4.44

• x = 1.36

• x = 4.34

• x = 1.37

What is the inverse (opposite) of addition?

• addition

• subtraction

• multiplication

• division

How do we solve an algebraic equation?

• We do the opposite operation on BOTH sides of the equation.

• We do the same operation on both sides of the equation.

• We do the opposite operation on only 1 side of the equation.

• We don't.

What needs to be done to solve this equation?

z - 5 = 20

• subtract both sides by 5.

• add five to both sides.

• cross out the 5.

• add five on the left side of the equation.

How would we solve the following equation?

x + 3 = 10

• subtract 3 only on the left side of the equation.

• cross out the three.

• Subtract three on both sides of the equation.

• add three on both sides of the equation.

How do you show your work when solving equations?

• You do it the EXACT same way Mrs. Motter taught you which is do the opposite operation on both sides of the equation.

• I just guess until I get the correct answer.

• I don't.