PLEASE HELP I DONT KNOW HOW TO SOLVE THIS IT HAS SO MANY STEPS...I DONT UNDERSTAND ALGEBRA

Josiah collects old coins for a hobby. He has two fewer nickels than twice the number of other coins. If he has a total of 70 coins, how many of them are nickels?

Samantha and Vanessa have 102 fliers that they are distributing. If Vanessa gives out 15 less than twice the number of fliers as Samantha, how many did Samantha hand out?

Determine which numbers are members of the solution set for the inequality: −5, 0, 5, 10.2x – 5 > 10

A car dealership sells trucks for at least $31,620. The truck you want to buy requires a down payment of $3,000 and 60 monthly payments. What would be the amount of each monthly payment?