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One step equations
multi-step equations
variables on both sides
How many solutions?
Formulas
100

How do you "undo" division in an equation?

Multiply to booth sides

100

x + 2x= 12

x=4

100

How do you "undo" addition in an equation?

Subtract from both sides

100

How do you "undo" subtraction in an equation?

Add on both sides

200

x=10+5

x=15

200

How do you "undo" multiplication in an equation?

Divide both sides

200

5z+10=3z + 20

z=5

200

6y-20=-20+6y

Infinite solutions

300

1/3X=5

x=15
300

10y-5=25

y=3

300

3(x+5)= 45 +2x

x=30

300

4m-4=4m+82

No solution

300

y=mx+b for x

y/m - b/m = x

400

2x=10

x=5

400

4g-5+3g=16

g=3

400

4(x-3)= 2x+2

x=7

500

1/8x=4

x=32

500

A=1/2bh for b

2A/h=b