+118613 4k+7-6k
You can only add and subtract like terms.
Like terms must have the same letters and those letters must have the same powers.
Think of it like this (when adding and subtracting letters)
4 kites + the number 7 -6 kites
=4 kites - 6 kites + the number 7
Yes I know, you have not got 6 kites to give away - too bad you must have promised more thena what you have got.
=4k+7-6k = 4k - 6k +7 = -2k + 7
