Concept explainers
To find: the numbers based on the given description
Answer to Problem 11P
The one number is
Explanation of Solution
Given information: “The sum of two numbers is 15”, “Three times one of the numbers is 11 less than five times the other”
Concept Involved:
Assign variable for the unknown that we need to find.
Use the keywords in the statement to rewrite the statement to meaningful math equation.
“is” means =
“less than” means −
“Sum” means +
“three times” means 3×
Solve the equation by getting the variable in one side of the equation and undoing whatever is done to it by performing reverse operation.
Calculation: Assign variable for the unknown that we need to find
Let x represents one number
Since the sum of two numbers is 15, the expression that represents the other number is x less than 15.
Rewrite the statement “Three times one of the numbers is 11 less than five times the other” in terms of x
3 times x is 11 less than 5 times 15-x
Use the keywords to write the statement “3 times x is 11 less than 5 times 15-x ” as an equation
Distribute 5 in right side of the equation
In the process of getting x in one side of the equation add 5x on both sides
Combine like terms on both sides
Divide 8 on both sides of the equation
Simplify fraction on both sides of the equation
Substitute 8 for x in the expression
Conclusion:
The one number is
Chapter 3 Solutions
Algebra: Structure And Method, Book 1
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