Question 199040: {2x + y=7
{-5x - 2y=8
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! 1) 2x +y = 7
2) -5x -2y =8
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(1) *2 = 4x +2y =14,,,,,(1a)
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add (1a) + (2) = -x = 22,,,,,x=-22
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subst in (1)
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2(-22) + y = 7
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y = 51
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checking
(1) 2(-22) + 51 = 7,,,ok
(2) -5(-22) - 2(51) = 110-102=8,,,,ok
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