anonymous
  • anonymous
Solve using linear systems. 2(x-1) - 3(y-3) = 0 3(x+2) - (y-7) = 20
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Mertsj
  • Mertsj
2x-2-3y+9=0 2x-3y=-7 3x+6-y+7=20 3x-y=7
Mertsj
  • Mertsj
So now we have: 2x-3y= -7 3x - y = 7
anonymous
  • anonymous
yeaa

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Mertsj
  • Mertsj
Let's take that second equation and solve it for y. We would get y=3x-7
Mertsj
  • Mertsj
Are you with me so far?
anonymous
  • anonymous
wouldn't it be -y = -3x + 7
anonymous
  • anonymous
oh wait.. y = -(-3x+7) = what u said yes go on
Mertsj
  • Mertsj
now multiply by -1 to get y
Mertsj
  • Mertsj
So let's take that value for y which is 3x-7 and put it in the first equation in place of y
Mertsj
  • Mertsj
2x-3y=-7 2x-3(3x-7)=-7
anonymous
  • anonymous
everything is clear till now
Mertsj
  • Mertsj
2x-9x+21=-7 -7x=-28 x=4 But y = 3x-7 y=3(4)-7 y=12-7 y=5 So the solution of the system is the ordered pair (4,5) and if you graphed the two equations you were given the lines would cross at (4,5)
anonymous
  • anonymous
damn, tysm
Mertsj
  • Mertsj
you are welcome

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