what is the solution to 2x – 7y = -21; y = 2/7x – 1?

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1 Answer

line 1: 2x-7y=-21    or 7y=2x+21, so y=(2/7)x +3

line 2: y=(2/7)x -1

line1...2x -7*(2/7)x -7*(-1) =-21

2x-2x +7=-21

7=-21

yer formulas giv 2 PARALLEL lines
by

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