Question

2x+y=7 x+3y=2 Then what is the value of x and y?

Answer 1

2x+y=7.......(1)

x+3y=2

x=2-3y......(2)

Put (2) in equation (1)

2x+y=7

2( 2-3y)+y=7

4-6y+y=7

4-5y=7

-5y=7-4

-5y=3

y=3/(-5)

Put y=3/(-5) in eq. (1)

2x+y=7

2x+ [ 3/(-5)]=7

2x=7/1 + 3/5

2x=(35+3)/5

X=38/5*2=19/5

x=19/5

y=-3/5

Thanks....