Question: solve for y: 6y+3 (y-6)=5 (y+1)-2 .
6y + 3(y - 6) = 5(y + 1) - 2 -- expand the brackets
6y + 3y - 18 = 5y + 5 - 2 -- put all the y-terms on one sides, and the numbers on the other.
6y + 3y - 5y = 5 - 2 + 18 -- now do some arithmetic
4y = 21
y = 21/4