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as parallel or coinciding? Explain why.
1) x+y=5
y=7-x
2) 3x-y=2
16x-5y=11
3) 3over5x - 7over5y = 1
x-7over5y=5over3
4) y=3x-9
2x-y=6
5) x=3y
2x-5y=0
any help would be greatly appreciated Please NO smart comments Thank You!