_
0
100

55=u+9

u=46


100

rise over run 

y= 2x + 3


m = 2/1

200

2x=60

x=30


200

solve r

3r+6=18

R=4

300

27X=-81


x=-3


300

n+69=9

n = -60

400

4(3n-15)=80

n = 5/3 or 1.66

400

t or false

6=3 

False

500

Solve for b

mx+b = s


b= s-mx

500

-7(-c)=7c-12

no solutions

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