anshurm112 anshurm112
  • 28-12-2020
  • Mathematics
contestada

2x+3y=9
2x+y=7
simultaneous equation

Respuesta :

laxmiyuvraj
laxmiyuvraj laxmiyuvraj
  • 28-12-2020

Answer:

x=3 and y=1

Step-by-step explanation:

subtract equation 2 from 1

then (2x+3y) -(2x+y) =9-7

2x-2x+3y-y =2

2y=2 therefore y=1

substitute y value in 2x+y=7

2x+1=7

2x=7-1

2x=6

x=3

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