What is the value of x in the equation 6 +4x = 7

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Given: △acm, m∠c=90°, cp ⊥ am , ac: cm=3: 4, mp-ap=1. find am.

Arace is 10 kilometers long. markers will be placed at the beginning and end of the race course and at each 500 meter mark. how many markers are needed to mark the course for the race?