standard form
Algebraic Proportions
100

Y=3x+5 

-3x+y=5

100

x/3 = 8/12

x=2

200

y-2=4(x+1)

−4x+y=6

200

x/5= 15/9

x=3

300

y=−2x−7

2x+y=−7

300

7/4=X/20

x=35

400

y=1/2x+6

−x+2y=12

400

X/6=9/2

X=27

500

2y=5x−3

−5x+2y=−3

500

12/X = 4/10

X=30

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