Question

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

Answer 1

`(2a-b)/(b)\\\\substitute\ a=4;\ b=-3:\\\\(2\cdot4-(-3))/(-3)=(8+3)/(-3)=-(11)/(3)=-3(2)/(3)`


`or\ if\ 2a+(b)/(b)=2a+1\ then\ for\ a=4\ and\ b=-3:\\\\2\cdot4-3=8-3=5`

Answer 2

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 '.