Help (maths)

I know how to do simultaneous equations (easy and medium) but can someone help me on these types of ones
Write out the question and answer then take a picture and put it on here

To solve them, you need to find a common factor (eg 10 for 2 and 5,) and multiply each equation so it has 10x in it. Then subtract one equation from the other and you will be left to work out one variable!

No we can't do questions for you. How far have you got.

Um. I’ve actually tried doing the questions just because I haven’t added an attachment of my working out it doesn’t mean I haven’t done these questions.for your information I have a test tomorrow and I have to get revision done so I can pass this test as I’ve already mentioned, I’m finding simultaneous equations easy but these 3 questions are quite hard.. and I find it quite weird that solving at least one question for me is too much to ask for.... anyways.. for these 3 questions, Whilst trying to make x/y the same I remembered that my teacher told me that the number you multiply for each equation should be the same and that’s when I gave up because I knew I would get the wrong answer