anonymous
  • anonymous
Help Please!!!! I'll Fan and give medal!!! Find the common solution for 2x + 7y = -38 and -5x - 8y = 38 X=? Y=?
Mathematics
katieb
  • katieb
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texaschic101
  • texaschic101
use the addition/elimination method...
anonymous
  • anonymous
2x+7y = -38 -5x-8y=38 the thing is to make the coefficient of one of the variables equal and then eliminate it. multiplying the first equation by 5, 10x+35y = -190 second equation by 2, -10x-16y=76 adding them eliminates the x-variable 35y - 16y = -190 + 76 Therefore, 19y = -114 find y from here, then substitute in any one of the originally given equations and get the values of x.
anonymous
  • anonymous
y=-6 andx=2

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anonymous
  • anonymous
VERY GOOD :)

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