Question

slove the PLE by elimination method:x+2y=20and x-y=5​

Answer 1

Answer:

y =5 and x = 10

hope it is useful ..

Answer 2

Step-by-step explanation:

x+2y=20 --eq 1

x-y=5 --eq 2

Multiply eq 2 by 2

2(x-y=5)

2x-2y=10 --eq 3

Adding eq 1 and 3

x+2y=20

2x-2y=10

3x=30

so,x=10

10-y=5

y=10-5

y=5

So,x=10

y=5