Mark’s age twenty years ago if she will be N years old at 10 years from now? a. 20 - N b. 30 - N c. N - 20 d. N - 30

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter2: Linear Equations
Section2.4: Solving Equations With The Variable On Each Side
Problem 53PFA
Question

What is Mark’s age twenty years ago if she will be N years old at 10 years from now?

a. 20 - N
b. 30 - N
c. N - 20
d. N - 30
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