bmgtcreative bmgtcreative
  • 02-05-2018
  • Mathematics
contestada

system of equations

y=2x-3
x+y=18

Respuesta :

mamercier21 mamercier21
  • 02-05-2018
2x-3=-1x+18
+1x   +1x
3x-3=18
   +3  +3
3x=21
divide both sides by 3
x=7

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