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

One-eleventh of all sales at Joe's Diner are for cash. If cash sales for the week were $380, what were Joe's total sales?

Clare Frances sells air fresheners for automobiles for $6.00 and powdered air cans for $4.00. Total sales were $196. Customers bought 4 times as many air fresheners as powdered air cans. How many of each was sold? A. Number air fresheners; B. Number powdered air cans

The cost of oil is 6 times the cost of wood. The total bill for oil and wood is $700. What was the expense for each? A. Cost of oil; B. Cost of wood

An equation represents a math expression of equality.

10 (C - 7)= 30

One day Marika Company produced 6 times as many wood stoves as Barry Company. If the difference in their production is 15, how many stoves did Barry produce that day?

B - 11 = 40; B = 29.

Momentum Electronics produces 4 times as many E-readers on shift 1 as it does on shift 2. If a total of 85 E-readers were produced, how many were made on shift 1?

Coffee costs $12 per case, and tea costs $8 per case. If an order comes in for a total of 250 cases for $2,400, what was the specific number of cases of tea?

Solve for the unknown, showing all work. (If necessary, round to the nearest hundredth.) 1,105 = B + 82

Q + 92 = 128; Q equals:

Over the past month, 900 trucks were sold. Abe sold 4 times as many as Joe. How many did each sell? A. Number of trucks Abe sold. B. Number of trucks Joe sold.

A local Walmart sells sweatpants ($7)and jackets ($14). If total sales were $6,160 and customers bought 8 times as many sweatpants as jackets, what would be the number of jackets sold?

Jerry's age 3 years ago can be expressed as:

An equation is:

B + 8 = 9; B = 17.

B/30 = 9; B = 270.

When an equation uses addition, the variable can be solved by the opposite process: subtraction.

Staples has a discount on flash drives and boxes of computer paper. It offers flash drives for $6 each and boxes of computer paper for $40 each box. If total sales on these discount items is $4200 for the week, and customers bought 5 times as many flash drives as boxes of computer paper, how many boxes of computer paper were sold?

Lucy and Ayu sold a total of 1,080 iPads. Lucy sold 7 times as many as Ayu. How many did each sell? A. Number Lucy sold; B. Number Ayu sold.