G8 Ch 1 Review

Vocabulary

100

A _____ is an unknown amount/quantity or value.

A variable is an unknown amount/quantity or value.

200

___ ___ have the same variable or no variable

like terms have the same variable or no variable

300

_____ means to put together; add.

What is combine?

400

a rule in math that is the first step to follow when solving multi-step equations

The Distributive Property is a rule in math that is the first step to follow when solving multi-step equations

500

The four steps to solving multi-equations are 1. ___ 2. ___ 3.____ 4._____.

The four steps to solving multi-equations are 1. Distributive Property 2. Combine like terms (get the variable on one side) 3. Get the variables on one side. 4. Solve.

1-2 step equations

100

-7m = 63

-7m = 63 m=-9

200

56/n=-8

n=-7

300

-2k-4=8

k=-6

400

h/-3 + 6 = -4

h=30

500

h-9/5=-10

h=-8 1/5

combining like terms

100

6m – 5m + 1

m+1

200

-6x(4-5)

-24x+30x=6x

300

9-3d(6+9)

9-18d-27d= 9-45d

400

-4(-5f-3) +11 - 2f

-4(-5f-3) +11 - 2f 20f+12+11-2f 18f+23

500

g-4m+2(m-3)+6-2g

-g-2m

3 to multi-step equations

100

3m-1=m+5

3m-1=m+5 2m=6 m=3

200

-5-3x=2x+10

x=-3

300

4n-40=7(-2n+2)

4n-40=7(-2n+2) n=3

400

38+7k=8(k+4)

k=6

500

4(-8m+5)=-32m-26

4(-8m+5)=-32m-26 no solution