Seudónimo Seudónimo
  • 22-02-2018
  • Mathematics
contestada

Use the elimination to solve this equation.

2x+3y=55
9x+4y=105

Respuesta :

hoottootriot
hoottootriot hoottootriot
  • 22-02-2018
x=5 y=15 (5,15). 
This is how you do it:
-4(2x+3y=55): -8x-12y=-220
3(9x+4y=105):27x+12y=315

You add the two new equations together, canceling out the y values, and get the x value. Then, you go back and plug in the x value in the original equation to get the y value.

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