Question 9135
ax-b=x+c


Get all the terms with x in them on one side. Get all the other terms on the other side...


ax-b-x = c
ax-x = c+b


This says "a" lots of x minus "1" lot of x...you cannot do this...one is a letter, the other a number. Tough!


What we can do is re-write it, by factorising:


x(a-1) = b+c


so that x = (b+c)/(a-1)


Note i have added the brackets so you know that b+c is together as are a-1.


jon.