Thomas has $50 and is saving $8 per week. Matt has $150 and is saving $3 per week. At some point, both boys will have the same amount of money. After how many weeks will the boys have the same amount of money? How much money will they have?

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

Ineed in figuring out this problem.

How is working backward similar to solving an equation?