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03-11-2016
Mathematics

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5x-6y=-15 5x+6y=12 use elimination

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Аноним Аноним

03-11-2016

5x-6y=-15
5x+6y=12
---------------add
10x = -3
x = -3/10
x = -0.3

5x+6y=12
5(-0.3) + 6y = 12
6y = 12 + 1.5
6y = 13.5
y = 13.5 / 6

y = 2.25

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