8th Grade Math

System of Equations - substitution

100

y=x-7

y=6

x=13

200

y-x=11

x=17

y=28

300

y=6x-8

y=4x+6

x=7

y=34

400

y=2x+54

y=8x

x=9

y=72

500

-3x+2y=-12

y=2x-7

x=2

y=-3

Multi Step Equations

100

17u-9u=16

u=2

200

-7w-8+3w=16

w=-6

300

7u=48+u

u=8

400

3v=32-5v

v=4

500

-9(x-4)=5x-34

x=5

Number of solutions

100

-2(w+1)+5w=3(w+1)-2

-2=1

( NO SOLUTION ) 

200

-3(y+2)=2(y+6)+7

-5=y

300

6(x-2)+2=2(3x-5)

6x-10=6x-10

( INFINITELY MANY SOLUTIONS )  

400

-3(v+1)+7v=4(v+1)-5

-3=-1

( NO SOLUTIONS )

500

4(u-1)-1=2(2u-3)

-3=-6

( NO SOLUTIONS ) 

One Step Equations

100

-5=x-3

x=-2

200

x-6.8=4.38

x=11.18

300

3+v=-4

v=-7

400

2=y+7

y=-5

500

x-5.29=4.9

x=10.19