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04.03.2021 •
Mathematics
Elliot buy 5 rubbers and 5 pens for £7.5.
Elise buy 1 rubber and 3 pens for £2.5.
Work out the cost of one rubber and one pen.
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Ответ:
1 2⋅−1⋅3 5=4 5
Step-by-step explanation:
Combine multiplied terms into a single fraction
12y−1⋅35=45
\frac{1}{2}y-1 \cdot \frac{3}{5}=\frac{4}{5}
21y−1⋅53=54
12−1⋅35=45