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04-06-2017
Mathematics

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2x - 3y = -12
y = 9 - x
Solve by substitution

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azhangstuy azhangstuy

04-06-2017

2x - 3(9-x) = -12

2x-27+3x=-12

5x-27=-12

5x=15

x=3

y=9-x
y=9-3

y=6

x=3
y=6

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