juju2123money juju2123money
  • 01-08-2017
  • Mathematics
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3x-4y=-5 y=4x-2 Is (1,2) a solution of the system?

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LAGRHA15 LAGRHA15
  • 01-08-2017
If you want to check if (1,2) is a solution to the system, you have to plug the x and y values back into both equations. If they work for one equation, but not the other, than the coordinates are not a solution to the system.

3(1) - 4(2) = -5
3 - 8 = -5
-5 = -5 

2 = 4(1) - 2
2 = 4 - 2 
2 = 2

Since both of these checks are true, then (1,2) is a solution to the system.
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