gabegabemm1
25.03.2021 •
Mathematics
A woman bought some large frames for $14 each and some small trames for S7 each at a closeout sale. If she bought 25 frames for $231, find how many of each type she bought.
She bought large frames.
And small?
Solved
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Ответ:
the answer to this question is 9
Ответ:
HOPE THIS HELPS!!!
Step-by-step explanation:
Let a = number of large frames she bought
Let b = number of small frames she bought
(1) a+B+=27
(2) 14a+7b=245
There are 2 equations and 2 unknowns
so it's solvable
Multiply both sides of (1) by 7
and subtract (1) from (2)
(2) 14a+7b=245
(1) -7a-7b=-189
7a=56
a=8
and
(1) a+2B=27
(1) 8+b=27
(1) b=19
She bought 8 large frames and 19 small frames
check:
(2) 14+7b=245
(2) 14*8+7*19=245
(2) 112+133+=245
(2) 245=245
Ответ: