abbyhurst17 abbyhurst17

22-12-2014
Mathematics

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seven cakes cost £2.10 how much do ten cakes cost

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Аноним Аноним

22-12-2014

[tex]\begin{array}{ccc}7\ cakes&-&\£2.10\\\\10\ cakes&-&x\end{array}\ \ \ |cross\ multiply\\\\7\cdot x=10\cdot\ \£2.10\\\\7x=\£21.00\ \ \ \ |divide\ both\ sides\ by\ 7\\\\\boxed{x=\£3.00}\leftarrow answer[/tex]

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