the question says evaluate 2a-b/b when a=4 and b=-3.
How would I start this problem?

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(2) Answers

BettieZumbrunnen

You would start by writing down the expression that you have to evaluate:
2a - b/b
Then, get to work:
-- Wherever you see 'a', put in 4 .
-- Wherever you see 'b', put in -3 .
2(4) - (-3/-3)
Can you handle that ?
Hint:
The thing on the right is a fraction with the same number on top and bottom.
Any fraction like that is always equal to ' 1 '.