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how to solve the system for x and y value as an ordered pair

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   how ton solve the system for x and y as an ordered pair         

y=5x+8 

y=3x+6

Dec 2nd, 2014

y=5x+8  multiply by 3

y=3x+6   multiply by 5

3y=15x+24    equation   i

5y=15x+30    equation    ii  

subtract the two equations i.e equation i from equation ii to get

2y=6

therefore

y=3

to get x substitute y in eqn  i

3=5x+8

5x=-8+3

5x=-5

x=-1

therefore

y=3

x=-1


Dec 2nd, 2014

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Dec 2nd, 2014
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Dec 2nd, 2014
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