How do you solve #14 = t + 12#?
Lets just think about this for a moment.
There is a link between the words 'equation' and the word 'equals'
Basically this is stating the 'intrinsic' value on the left is and must remain the same as the 'intrinsic value on the right.
Consider the example of
Suppose we subtracted 1 from just the left side then the statement would become:
So to maintain the equals bit we have to do the same to both sides. Thus:
If we can change the 12 into 0 then
Subtract 12 from both sides
Move the 12 to the other side of the = and change its sign from + to -