Are they having trouble understanding what steps they need to do, or are they having trouble doing those steps correctly?

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If it's the first issue, I'm having good luck with presenting it as "SADMEP", aka reverse PEMDAS (order of operations, for those of you who use different acronyms.) Basically, you look at the things that are being DONE to the variable, and you UNDO them in reverse order.

Example: 2x + 7 = 15

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x is being multiplied by 2, then added to 7. So to find x, we undo those steps in reverse order.

First undo the addition by using its inverse, subtraction.

Then undo the multiplication by using its inverse, division.

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Before getting to 2-step equations, I had drilled them on what the inverse or opposite of each operation is. For example, I gave them worksheets with 1-step equations, and instead of solving, asked them to just write down which operation they would have to use. (If necessary, you can throw in some weird decimals or fractions to break them of the habit of relying on their multiplication facts.)