   Chapter 5, Problem 23AT ### Contemporary Mathematics for Busin...

8th Edition
Robert Brechner + 1 other
ISBN: 9781305585447

#### Solutions

Chapter
Section ### Contemporary Mathematics for Busin...

8th Edition
Robert Brechner + 1 other
ISBN: 9781305585447
Textbook Problem

# Set up and solve equations for each of the following business situations.A regular lightbulb uses 20 watts less than twice the power of an energy-saver lightbulb. If the regular bulb uses 170 watts, how much does the energy-saver bulb use?

To determine

To calculate: The power of energy saver bulbs, if the power used by a regular light bulb is 20 watts less than the twice the power used by energy-saver light bulb and the power used by regular bulb is 170 watt.

Explanation

Given Information:

The power used by a regular light bulb is 20 watts less than the twice the power used by energy-saver light bulb and the power used by regular bulb is 170 watt.

Formula used:

To solve the equation and prove the solution, follow the steps as mentioned below.

Step 1: Understand the problem and write the facts of the equation.

Step2: List the known and the unknows from the problem.

Step3: Write the equation with the help of following table of key word,

 Equal Sign Addition Subtraction Multiplication Division Parentheses Is And Less of Divide Times the quantity of Are Added to Less than Multiply Divided by Was Totals Smaller than Times Divided into Equals The sum of Minus Product of Quotient of Gives Plus Difference Multiplied by Ratio of Giving More than Decreased by Twice Leaves Larger than Reduced by Double Results in Increased by Take away Triple Produces Greater than Loss of At yields exceeds Fewer than @

Step4: Solve the equation by rearrange the unknown values to the left side and known values to right side of the equal sign.

Step5: Prove the solution by substituting the value obtained from step 4 in the equation formed in step 4 then check the left and right of the equation if, they are equal then the answer is correct.

Calculation:

Suppose that X be power used by energy saver bulbs.

Underline the keyword by using the table of key word.

Consider the power used by a regular light bulb is 20 watts less than the twice the power used by energy-saver light bulb

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