[Adderb]

y = -x/2
2x - 3y = -7

I have reached this point:

2x - 3(-x/2) = -7

Can someone help me? Thanks!

[Capuchin]

Okay, the next step is to expand the brackets:

2x + 3x/2 = -7

then collect similar terms

7x/2 = -7 ---> 7x = -14

x = -2

you can use this value for x to work out y, using one of your initial equations.

Then you can use the other equation to check if your values are correct.

Hope this helps

[Adderb]

y = -x/2
2x - 3y = -7

I have reached this point:

2x - 3(-x/2) = -7

Can someone help me? Thanks!!

Still confused, how did you get 7x/2 = -7

[Capuchin]

In order to add fractions, you need to give them the same denominator.
so we convert 2x into a fraction with denominator 2

2x = 4x/2

putting this into your equation:

4x/2 + 3x/2 = -7

Now you can add the numerators:

7x/2 = -7

Apologies for not elaborating on this before, I did it in my head :p