Solving 1-Step Equations

Adding

100

x + 10 = 22

x=12

200

x + 9 = 12

x=3

300

x + 13 = -13

x=-26

400

x + 15 = 7

x=-8

500

x + 16 = -4

x=-20

Subtracting

100

x - 10 = 11

x=21

200

x - 15 = 22 

x=37

300

x - 8 = -12

x=-4 

400

x - 12 = -17

x=-5

500

x - 16 = 45

x=61

Vocab

100

What is another name for INVERSE?

Opposite

200

What are the 4 main operations and their opposites? 

addition/subtraction

multiplying/dividing

300

what are we doing when we "plug in" the answer? 

substitution 

400

What is a variable? 

the unknown, represented by a letter

500

x + 3 = 9

What is the 3 called?

a constant 

Multiplying

100

2x=16

x=8

200

3x=-15

x=-5

300

-4x=-20

x=5

400

-7x=49

x=-7

500

-5x=-125

x=25

Dividing

100

x/5=-3

x=-15

200

x/-6=-4

x=24

300

x/12=12

x=144

400

x/-15=-4

x=60

500

x/-14=-4

x=56