How do i solve 7 + xh + h – 5 + 6hx + 2 + 3h

Combine like terms.
7 + xh + h – 5 + 6hx + 2 + 3h
= 4 + xh + h + 6hx + 3h
= 4 + 7xh + 4h

=7xh + 4h + 4

The original question is probably more like:

(7 + xh + h – 5 + 6hx + 2 + 3h) / h

You're probably doing that in an attempt to eliminate h for First Principles derivation.

To eliminate h, you need to factor h in the numerator of your question.
So first, collect like terms: (eg. constant by itself like 2, or coefficient xh, or coefficient h).

1. [6xh + xh] + [h + 3h] + [7 + 5 - 2]
2. 7xh + 4h + 0 OR = 7xh + 4h
3. h (7x + 4)

Now you have factor the h out in the numerator of your full question.

= h (7x + 4) / h = 7x + 4

Therefore, the final answer should be 7x + 4.

Combine Like Terms.
6hx+hx+3h+h+7-5+2
=7hx+4h+4