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Q: What is -x plus 2y equals 12?

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x = 11 - 2y and 14 - 2y. This means that 11 = 14. Is there a typo in the question?

x = 3 and y = 2

are you talking about a system of equations where x+3y=-7 -x+2y=-8 if so, then the answer is {2,-3}

Perpendiculat straight lines.

X+2y=6 how to solve? 2y=6-x then y=3-x so y=3-x

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x = -4 and y = 4

2y(x+2)=

-2y=x+8 is the answer

This means that 2y - 3 = 2y + 4 which is not possible.

(12, 1)

x + 2y = x + 2y Y and X aren't compatibles.

Both of them are equations!The solution is (x, y) = (2, 1).

x = 11/7 and y = 12/7

If the two equations are (i) 4x + 2y = 12 and (ii) x + 2y = 6, proceed as follows: Rewrite (ii) as x = 6 - 2y; substitute this expression for x into (i) to result in 4(6 - 2y) + 2y = 12, or 24 - 8 y + 2y = 12, or - 6 y = 12 -24 = -12, or y = -12/-6 = 2. Then, back to (ii) again, x = 6 - 2(2) = 2.

x = -8, y = 10

They are straight lines.

x=2y-1

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