hopectrammell1
29.04.2021 •
Mathematics
Interpreting Algebraic Expressions
11+9k=6n
The expressions has 2 terms.
True or false?
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Ответ:
we can represent "in seven years" as (n + 7)
and
represent "last year" as (n - 1)
so
"in seven years, huang will be two times as old as he was last year"
would translate to
(n + 7) = 2(n - 1)
to solve for n
first distribute the 2
n + 7 = 2n - 2
subtract n from both sides
7 = n - 2
add 2 to both sides
9 = n
therefore
n = 9
so Huang is currently 9 years old (C)