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11-03-2015
Mathematics

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What is 2x-3y=-1
y=x-1
Solving systems of equations by Substitution

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11-03-2015

2x - 3y = -1
y =x -1

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

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