Equations Review: Pre-Algebra

Systems

100

Is there one solution, none, or infinite to the following without graphing?

y=3x+1 and y=3x

None-Parallel Lines

200

Is there one solution, none, or infinite to the following without graphing?

y=5x+15 and y=5x+15

Infinite-Same Line

300

Is there one solutions, none, or infinite to the following without graphing?

y=2x+8 and y=1x+8

One Solution-Different x amounts 

400

Is there one solution, none, or infinite to the following without graphing?

y=8x+10 and y=-8x+10

One Solution-Different x amounts

500

Is there one solution, none, or infinite to the following without graphing?

y=3x+12 and y=3(x+4)

Infinite-Same Line

Inequalities

100

2y+7>11

y>2

200

5+m+8≥14

m≥1

300

-1-3x>1-4x

x>2

400

-3-4x>-3-5x

x>0

500

-5x≥15

x≤-3

Variable on Both Sides

100

5 (x + 6) = -9x + 2

x = -2

200

2x + 3 = 19 + x

x = 16

300

8(1 + 5x) + 5 = 13 + 5x

x = 0

400

2(4x - 5) = 7x + 1

x = 11

500

-3x + 4 = 2x +19

x = -3

Fractions

100

1/3x=10

x = 30

200

1/3y-1=2/3

y = 5

300

1/10y-1/5=9/10

y=11

400

1/8y-1/4=7/8

y=9

500

1/12y-1/6=11/12

y=13