Question

solve the following equation by graphically and cross multiplication method 3 X + Y - 11 =0 and x- y - 1 =0​

Answer 1

Answer:

Given

3x+y-11=0,x-y-1=0

then 3x+y-11=x-y-1

3x-x+y+y=-1+11

2x+2y=10

2x=10-2y

x=10-2y/2

2(10-2y/2)+2y=10

(20-4y/2)+2y=10

20-4y+2y=10*2

20-2y=20

-2y=20-20

-2y=0

y=0/-2

y=0

x=10-2y/2

x=10-2*0/2

x=10-0/2

x=10/2

x=5