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Exam 5: Solving for the Unknown: a How-To Approach for Solving Equations

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Question 31

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Jane weighs 12 pounds less than Shelley. Assuming Jane weighs 120 pounds, find Shelley's weight.

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W - 12 =...

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Question 32

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What number decreased by 630 equals 1,510?

A) 880
B) 2,140
C) 4,120
D) 1,240
E) None of these

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Question 33

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P + 77 = 101; P equals:

A formula is not an equation.

JCP sold a pair of pants that was reduced by $12.00. The selling price was $48.00. What was the original price?

A letter or a symbol that represents one or more numbers is a:

B + 40 = 90

B/5 + 3 = 15; B = 16.

Runyon Company sells T-shirts ($5)and shorts ($6). If total sales were $1,040 and people bought 4 times as many T-shirts as shorts, what would be the number of T-shirts and shorts sold? A. Number of T-shirts sold. B. Number of shorts sold.

More than one unknown in a word problem can be represented in terms of the same variable assigned to the first unknown.

Mike and Bill sell cars for Jangle's Auto. Over the past year they sold 640 cars. Assuming Mike sells 3 times as many as Bill, how many cars did Mike sell?

Match the term with its definition. -Variables

A furniture company produced 5 times as many beds on shift 2 as it did on shift 1. If a total of 240 beds were produced, how many were produced on each shift? A. Number produced on Shift 1. B. Number produced on Shift 2.

Solve for the unknown, showing all work. (If necessary, round to the nearest hundredth.) A + 80 = 165

1/4B ? 10 = 7; B = 67.

Andy Foll is 6 times as old as Mel Kaas. Andy is 15 years older than Mel. What is Mel's age?

20A - 40 = 8A + 160 (answer to nearest hundredth).

8 (A - 5)= 70

1,080 = B + 30

Ryan Small budgets 1/8 of his weekly salary for food. Ryan's food bill is $80. What is his weekly salary?