Question

How do you solve the system using elimination x−y=12 and 2x+y=3?

Answer 1

x-y=12. ×2

2x+y=3. ×1

2x-2y=24

2x+3y=3

__________

-5y=21

y= -21/5

put the value of y in 1st equation

x+21/5= 12

x=12-21/5

x=39/5