anonymous
  • anonymous
what is the y-coordinate of the solution of the system of equations? 3x+2y=-25 -x+y=0
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
solve the second equation for x. Let me know what you get..
anonymous
  • anonymous
idk....
anonymous
  • anonymous
if you add something to each side of an equation does anything really change, besides the way the equation looks?

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anonymous
  • anonymous
no
anonymous
  • anonymous
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
anonymous
  • anonymous
oh okay
anonymous
  • anonymous
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
anonymous
  • anonymous
y=x or x=y doesn't matter how you write it
anonymous
  • anonymous
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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