Equation word problems

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Nick opens a savings account with $50. Each week after, he deposits $15. He wants to save $500. Write an equation to show this situation.

Miss Violet is buying granola bars for her students. She already has 16 granola bars in her desk and needs a total of 100 bars. They are sold in packs of 12. Write an equation to show how many more boxes of granola bars she needs.

The formula for Force is F = ma, where F = force, m = mass, and a = acceleration. Solve for acceleration.

Cameron bought four begonias in 6-in pots and a $19 fern at a fundraiser. He spent a total of $63. What is the price per begonia?

Jenny wants to save $900 to go to Puerto Rico. She saves $45 each week. Her brother gives her $180. Write an equation to find how many weeks she must save.

Alex rents a car for one day. The charge is $18 plus $0.12 per mile. Alex wants to spend exactly $30. Write an equation to represent the situation.

A building contractor buys 525 metal bars. Because he is buying more than 500 bars, the wholesaler gives him a discount of $420. The total price is $3,780. Write an equation to find the cost per bar.

Bernard buys a speaker system for h dollars. He must pay 4% tax. Write an expression for this situation.