LillyMai

3+4(10-8)

Distribute 4 into 10 and -8 so it would look like this 3+40-32 

Combine like terms and you will get 11

It depends on the fraction, If the fraction has 1 as the numerator you would divide by the denominator.  An example is 6x1/3 you would basically divide 6 by 3, so that would equal 2. But if it was a fraction that doesn't have 1 as the numerator say you were trying to find 12x3/4. You would find what is 3/4 of 12 and that would equal 9.  Sorry if I'm not the best at explaining things! ^.^ I hoped this help something :P.

Combine like terms 2a-8+4a=10 

       So it will be    6a-8=10

Next, add 8 to each side  6a= 18

Divide each side by 6

a=3