Module 7 Summative

Vocabulary

100

The number in front of a variable

Coefficient

200

A letter used to represent a number

Variable

300

A number by itself

Constant

400

In the equation -7x + 9 = 15, what is the coefficient of x?

-7

500

In the expression below, which terms are like terms? 

-4 and 10

Equations with variables on one side

100

x-6=16

x=22

200

(x)/8=4

x=32

300

6-8x=-34

x=5

400

5x+6-3x=20

x=7

500

-8(2x+7)=-200

x=8

Equations with variables on both sides

100

-3+5x=4a-10

x=-7

200

-2x=x-7-8

x=5

300

4x+8+5=-15-3x

x=4

400

-40+2x=4x-8(x+8)

x=-4

500

-6(2x-2)=-8x+40

x=-7

Fraction Coefficients

100

x-2/5=-1/3

x=1/15

200

3/4x=1/2

x=2/3

300

2x-3/5=1/2

x=11/20

400

1/4x+x=-3+1/2x

x=-4

500

1/5x+2/3-2=x-2/5

x=-7/6 

Special Cases

100

4(x-2)=4x+10

No solution

200

1/2(8-x)=(8-x)/2

Infinitely Many Solutions

300

6(x-1)=6x-1

No solutions

400

6n+7-2n-14=5n+1

n=-8

500

2(x+12)=3x+24-x

Infinitely Many Solutions