multiplying the second equation by 4

8x – 4y

=

24

first equation

3x + 4y

=

10

add the equations

11x

=

34

x

=

34

11

multiply the first equation by 2

6x + 8y

=

20

multiply the second equation by –3

-6x + 3y

=

-18

add the equations

11y

=

2

y

=

  2

11