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Substituting that into the original equation gives us:

5x-5\times3+3(x+2)=7x

Can you do the second bracket?

To expand:

5(x-3)

We need to multiple every term inside of the bracket, by 5. So we get:

5(x-3)=5x-5\times3

In order to solve:

5(x-3)+3(x+2)=7x

You will need to first multiply out the brackets. I'll give you a hand with the first bracket

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