mdarter
18.06.2021 •
Mathematics
A piece of wood is 21 m long. How much piece of wood 07m 'long wood can be cut from it?
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Ответ:
Equation = 21/7=?
Revision: 7 x ? = 21
7+7+7 = 21
7 x 3 = 21
21/7 = 3
Answer = 3
Ответ:
50=100%
X=90%
X=50*90%/100
X=45