Question

by elimination method 2x+y=12,x-y=9​

Answer 1

Answer:

2x+y=12

this is 1 equation

x-y=9

this is your 2 equation

multiply 2 equation by 2

therefore,2x-2y=18

therefore,3y=-6

y=-2.

now put this value on 1 equation

Answer 2

Answer:

x=7, y = -2

Step-by-step explanation:

here is the answer