Writing Equations from Real-Life Word Problems

A store sells pencils for $2 each. Write an equation to represent the total cost, C, of buying p pencils.

• C = 2 + p

• C = 2p + 1

• C = p + 2

• C = 2p

Maria has x apples. She buys 5 more apples. Write an expression for the total number of apples Maria has now.

• 5 + x

• x + 5

• x - 5

• x * 5

A book costs $15. If you buy b books, write an equation for the total cost, T, of the books.

• T = 15 + b

• T = b + 15

• T = 15b

• T = 30b

Tom has 3 times as many marbles as Jerry. If Jerry has m marbles, write an expression for the number of marbles Tom has.

• 3m

• m

• 4m

• 2m

The perimeter of a rectangle is 30 meters. If the length is l meters, write an equation for the width, w, in terms of l.

• w = 30 - l

• w = 15 + l

• w = 15 - l

• w = 2l

A car travels 60 miles per hour. Write an expression for the distance, d, traveled in t hours.

• d = 60t

• d = 30t

• d = 60t^2

• d = 60 + t

If a shirt costs $20 and you have a discount of d dollars, write an expression for the final price, P, of the shirt.

• P = 20 + d

• P = 20 - d

• P = 20 / d

• P = 20 * d

A farmer has 12 cows and wants to buy c more. Write an expression for the total number of cows he will have.

• c - 12

• 12 + c

• 12 * c

• 12 - c

The sum of a number x and 7 is equal to 15. Write an equation to find the value of x.

• 12

• 6

• 8

• 10

If you have 4 times a number n and subtract 8, the result is 12. Write an equation and solve for n.

• 5

• 3

• 10

• -2