book Maths Puzzle Numerical Ability

A HOT AIR BALLOON IS AT AN ALTITUDE OF M METERS. WRITE A WORD PHRASEFOR EACH EXPRESSION. M+34
M-2000
3M

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book Other Question

And last one for the day...

Evaluate:

4 -1 3
5 2 -4
3 -5 2
answer with work please.2/3x-5=5(x-3)