anonymous
  • anonymous
solve system by anymeathod 4x-7y=-13 3x-5y=-9
Mathematics
schrodinger
  • schrodinger
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Owlfred
  • Owlfred
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anonymous
  • anonymous
thank you :)
anonymous
  • anonymous
Multiply both equations by 3 and -4, so you get \[12x-21y=-39\] and \[-12x+20y=36\] add to get \[-y=-3\] or \[y=3\] substitute and you get \[x=2\]

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anonymous
  • anonymous
long problem :/ especially to do online lol. So I, personally, would use substitution for this type of problem. 4x-7y=-13 3x-5y=-9 Second equation: y=3/5x+9/5 Substitute second equation to first equation. 4x-7(3/5x+9/5)=-13 4x-21/5x-63/5=-13 -1/5x=-2/5 x=2. substitute 2 for x into the second equation. 3(2)-5y=-9 6-5y=-9 -5y=-9/6 y=9/30 y=3/10. That should be right.

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