Simple
Easy
Hard
Difficult
Challenging
100

0=a+-8

a=8

100

2/5x-15=5/8x-16

x=5 5/9

100

14y+4=7+(y-11)34

( solve into a mixed number)

y= 18 11/20

100

5+2x=2x+6

No solution 

100

5y+4=3y+6

y=1

200

8=e+3

e=5

200

2(4-y)-3(3+y)=-11

y=2

200

r-23=(3r-4)2-5

r=-2

200

38+7k=8(k+4)

k=6

200

5(x-2)=3(x+4)

x=11

300

-7=0-m

m=7

300

5(z+4)-13=2z+19

z=4

300

12(3-7)+4+y=180

y=224

300

3(1-3x)=2(-4x+7)

x=-11

300

3(h-6)=2(5-2h)

h=4

400

-5=i+-4

i=-7

400

50(1)+5(20)=10x

x=15

400

6r+7=13+7r

r=-6

400

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

No solution 

400

-4(-3n-8)=10n+20

n=-6

500

-6=-6-a

a=0

500

14y-19(3)=29

y=2

500

-10+x+4-5=7x-5

x=-1

500

−3(x-1)+8(x-3)=6x+7-5x

x=7

500

-3x-32=-2(5-4x)

x=-2

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