y = 2x -1
y = 5x -13
So: 5x -13 = 2x -1
5x -2x = 13 -1
3x = 12
x = 4 and by substituting y = 7
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7x + y = 4y = 4 - 7x
y=±√15
To solve for x when z equals y divided by x, you can rearrange the equation to isolate x. Start by multiplying both sides by x to get xz = y. Then, divide both sides by z to solve for x, giving you x = y/z. This is the solution for x when z equals y divided by x.
(20 - x)/5
To solve for y, divide both sides of the equation by -0.8.