Question 123670
So, let's find the common denominator for all fractions. 42y is the one so we multiply the first fraction by 6, the second fractions by 7y, the third by 14 and the fourth by 2y.
18(y+7) -7y(4y-7)- 14(7y+10)+4y(7y-1) / 42y Simplify
(18y+126-28y^2+49y-98y-140+28y^2-4y)/ 42y Simplify more
(70y-14)/42y   -> (10y-2)/6y is the answer