alleryStart learning →The difference of a number and six is 13. What is the number?
An = 7
Bn = 13
Cn = 6
Dn = 19
Answer & Solution
Correct answer: D. n = 19
1. Let n represent the unknown number and translate the sentence into an equation: n minus 6 equals 13.
2. Add 6 to both sides to isolate n: n minus 6 plus 6 equals 13 plus 6.
3. Simplify: n equals 19.
4. Checking, the difference of 19 and 6 is 13, so the number is 19.
_Source: OpenStax Prealgebra (CC BY 4.0), Ch 9 "Math Models and Geometry", section 9.1 Use a Problem Solving Strategy_
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