shaunalab shaunalab

19-11-2017
Mathematics

contestada

Solve each system of equations by adding, subtracting, or multiplying.

2) x + y = 12
2x + y = 6

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qumpelka qumpelka

19-11-2017

x + y = 12
2x + y = 6

x = 12 -y
2x + y = 6

x = 12 -y
2(12 -y) + y =6

x = 12 -y
24 -2y + y =6

x = 12 -y
-2y + y = 6 -24

x = 12 -y
-y = -18

x = 12 - 18
y = 18

x = -6
y=18

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