Question

Solve graphically 2x+y=5 and x+3y=5

Answer 1

Explanation:

(2x+y=5)1 {multiple the value of x on up and down}

(x+3y=5)2

2x+y=5 _(1)

2x+6y=10_(2)

subtraction the equation 1 and 2

2x+y=5

- 2x+6y=10

0+7y= -5

y=-5/7

put the value of y in equation 1

2x+y=5

2x+-5/7=5

2x=5+5/7

2x=35+5/7

2x=40/7

x=40/(7)2

x=20/7