egmoccer6yai egmoccer6yai

11-08-2016
Mathematics

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what is the solution to the system of equations? x-y=7 3x-2y=8

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Ckaranja Ckaranja

13-08-2016

x-y=7
3x-2y=8
Multiplying equation I by 2;
2x-2y=14
3x-2y=8
Subtracting equation 1 from equation II;
x=-6
Replacing for x in equation II
3(-6)-2y=8
-18-2y=8
2y=-18-8
2y=-26
y=-13

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