Mathematics, 13.10.2020 15:01 th483

How do I solve a problem like this? I solved it like: 3x-10+2x+20=45 and got x=9 but I was wrong. Can you help me understand what I did wrong? Thank you!

How do I solve a problem like this?

I solved it like: 3x-10+2x+20=45 and got x=9 but I was wrong.

Answers: 2

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How do I solve a problem like this? I solved it like: 3x-10+2x+20=45 and got x=9 but I was wrong. C...