solve x + y = 7, 3x – y = 1 by method of substituion Question solve x + y = 7, 3x – y = 1 by method of substituion in progress 0 Math Margaret 4 weeks 2021-08-18T18:10:33+00:00 2021-08-18T18:10:33+00:00 2 Answers 0 views 0

## Answers ( )

y=27/2

Step-by-step explanation:3y-27-y=1y=27/2

equation same on x+y=7

Answer:x + y = 7

=> y = 7 – x —-( 1 )

3x – y = 1 —-( 2 )

Substitute y = 7 – x in equation ( 2 ),

we get

3x – ( 7 – x ) = 1

=> 3x – 7 + x = 1

=> 4x = 8

=> x = 8/2

=> x = 4

Put x = 4 in equation ( 1 ), we get

y = 7 – 4

=> y = 3

Therefore ,

( x , y ) = ( 4 , 3 )