You just see how many times the fraction goes into 1 - its the same from there. For example, if the question was 1/3p=5 - the answer would be 15. This is because 1/3 goes into one 3 times there are 5 ones in 5 obviously.
you need to get all the vairables on one side. say the problem is 2x+3=x+5 then you need to put the x on the right side of the = to the left. when you do that it switches the positive x to negitve....