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what is the y-coordinate of the solution of the system of equations? 3x+2y=-25 -x+y=0

Mathematics
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solve the second equation for x. Let me know what you get..
idk....
if you add something to each side of an equation does anything really change, besides the way the equation looks?

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Other answers:

no
7x=7 if x=1 then this equation is true, correct? if we add 3 to each side 7x+3=10 and x is still 1, the equation is still true just looks different
oh okay
we want to get x by itself and positive the easiest way to do that is to add x to each side of the equation. y - x = 0 y - x + x = 0 + x
y=x or x=y doesn't matter how you write it
Now that we know this. we can substitute the x's for a y. This is called the substitution method. 3(y) + 2y = -25 Now solve for y

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