Question 514408
1)solve both by elimination method: 
5x+6y=2
10x+12y=4
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Multiply thru the 1st equation by 2 to get:
10x+12y = 4
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Subtracting that from the 2nd equation gives:
0 = 0
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Conclusion: All points where y = (-5/6)x +(1/3)
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2) 
2r-7s=-12
7r+2s=11
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Multiply thru 1st by 7
Multiply thru 2nd by 2
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14r - 49s = -84
14r +  4s =  22
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Subtract and solve for "s":
53s = -106
s = -2
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Solve for "r":
2r - 7*(-2) = -12
2r+14 = -12
2r = -26
r = -13
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Cheers,
Stan H.
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