Two-Step Equations

Inverse Operations

100

How do we undo division?

Multiplication

200

What is the inverse operation of subtraction?

Addition

300

What is the order of operation?

Parenthesis (Grouping), Exponent, Multiplication, Division, Addition, Subtraction

400

Make a list of the operations we undo in order. I.e. which do we undo first...last.

(1) Add/Sub (2) Mult/Div (3) Exponents (4) Parenthesis (Group)

500

If I solved a two-step equation using subtraction and division, what were the two original operations?

Addition and Multiplication

Two-Step Equations 1

100

 2x + 5 = 17

x = 6

200

4m - 17 = 43

m = 15

300

9 = 7x + 9

x = 0

400

(x+3)/4 = 5

x=17

500

4(x+9)=12

x=-6

Two-Step Equations 2

100

x/4 + 7 = 13

x = 24

200

y/8 - 3 = 5

 y = 64

300

a/6 - 12 = 0

a = 72

400

(y+1)/-2 = 6

y = -13

500

3(n-7)=24

n=15

Two-Step Equations 3

100

19 + z/2 = 21

z = 4

200

108 = 4y - 16

y = 31

300

-18 = -6k + 6

k = 4

400

30 + w/30 = 30

w = 0

500

-9 - 2g = -15

g = 3