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Can you HELP me with these math problems?

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I missed a week of school because I went to Florida for vacation. And my math teacher gave me problems to do, and I'm completley lost & clueless on how to do them. On the worksheet, it just says to solve each equation. And I don't know how. Here's a few I'd like help on;

3(2z + 25) - 2 (z - 1) = 78

And then there are 2 problems with fraction I don't know how to do; (11/3)a - 1 = (7/11)a + 9

(2/5)x + (3/7) = 1 - (4/7)x

I'm not wanting answers. I'd just like to know how to do them.