Question

Solve the following system of linear equations graphically

3x + y – 12 = 0

x – 3y + 6 = 0 ​

Answer 1

Answer:

x =24/5, y=15/4

Step-by-step explanation:

3x + y-12=0 is A

x - 3y + 6=0 is B

B× 3 = 3x -9y +18=0 is C

A - C = 8y= 30

y = 30/8 = 15/4

then

3×A = 9x +3y -36 =0 is D

B+D = 10x =48

x= 48/10 = 24/5

× = 24/5 , y= 15/4