-2x + y = 5 is a line and can have an infinite number of answers.
if x=0 then y=5
if x=1 then y=7
If you graph these two points then draw a line through them you will have a graph of the points made of pairs of numbers that would make this statement true.
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Because all the terms have been divided by -1
2x+y=1
Solve for y.2x+y=5*subtract 2x from both sides*2x+y-2x=5-2xy=-2x+5 / y=5-2x
y = -2x+5 Slope: -2 Intercept: 5
2x+x-5 = 10 2x+x = 10+5 3x = 15 x = 5 and y = 0