wera6308 wera6308
  • 17-12-2021
  • Mathematics
contestada

-10x-5y=
5
-4x+5y=
23

Respuesta :

dodi00
dodi00 dodi00
  • 17-12-2021

x=1 y=-4

Explanation:

We add the given eqns. to get, (2x+5y)+(3x−5y)=−18+23

∴5x=5,or,x=1.

To get y, we use, x=1 in the first eqn. & get, 2+5y=−18, or, 5y=−20, so that, y=−4.

Answer Link

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