Can someone help me find X for number 4

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

Wrote and expression for the difference of p and 4

Find the rate of change for the situation. you run 7 miles in one hour and 21 miles in three hours.