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Solving system of equations by elimination

Algebra
Tutor: None Selected Time limit: 1 Day

5x+y=9

10x-7y=-18

Apr 25th, 2015

5x+y=9

10x-7y=-18

multiply equation (1) by 7

35x+7y=63

10x-7y=-18

now adding 2 equations.....

45x=45

x=1

substituting in equation 1

5+y=9

y=4

solution to the problem is x=1 and  y=4


Apr 25th, 2015

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Apr 25th, 2015

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Apr 25th, 2015

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Apr 25th, 2015

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Apr 25th, 2015

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Apr 25th, 2015

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Apr 25th, 2015

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Apr 25th, 2015

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Apr 25th, 2015

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