Question

2x-y=-1. , 2x+3y=11 by substitution method​

Answer 1

Step-by-step explanation:

2x-y=-1

2x=-1+y

now substitute 2x=1+y in 2x+3y=11

-1+y+3y=11

4y=10

y =12/4=3

2x=-1+y

=-1+3

=2

x=2/2

=1

Answer 2

Answer:

2x-y=-1

2x=-1+y

x=-1+y/2.........................(1)

2x+3y=11.........................(2)

substituting the value of x in equation second we get,

2x+3y=11

2(-1+y/2)+3y=11

-1+y+3y=11

4y=12

y=3

putting the value of y in equation 2 we get,

2x+3y=11

2x+3*3=11

2x=2

x=1