Solve using elimination.

3x - 5y = 18

-10x + 5y = 10

Yes that is the right answer

3x - 5y = 18 over

-10x + 5y = 10

Add them because the 5y's have the right symbols for us to add

-7x = 28

Divide

x = - 4

Now you can plug in - 4 for x in one equation, I would use the first equation!

3 (-4) - 5y = 18

-12 - 5y = 18

Add 12

-5y = 30

Divide

y = - 6

Your solutions are going to be:

x = - 4

y = - 6

To check your work plug x and y into one equation:

3 (-4) - 5 (-6) = 18

-12 + 30 = 18

18 = 18

Since 18 does equal 18 you know that your solution's work!