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lidiya [134]
3 years ago
11

\frac{x}{2.1} = \frac{60}{21} \\

Mathematics
1 answer:
Lemur [1.5K]3 years ago
5 0

Answer:

x is 6

look at the ratio of 2.1 to 21

2.1 is multiplied by 10 to get 21 and therefore since these fractions are equal, x would have to be 6 in order for the equation to work

Step-by-step explanation:

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when you multiply a number by a value that's greater than 1, that number increases, for example 2 and then we multiply it like 2 * 3, clearly 2*3 is greater than 2.

now when you multiply a number  by a value that's lesser than 1, that number decreases, for example 2 and then we multiply it by something like 1/4, so 2 * 1/4 = 1/2, well, clearly 1/2 is smaller than 2, so 1/2 is a decreased value of 2.

23)

we have here 4/7, and then a product, well, the product is 4/7 and 9/10, however 9/10 is less than 1, recall 1 = 10/10, 9/10 is just a tiny bit less than 1.

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 \bf \cfrac{4}{7}~~>~\left( \cfrac{9}{10}\times \cfrac{4}{7} \right)

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\bf \cfrac{5}{6}~~=~\left( \cfrac{5}{6}\times \cfrac{7}{7} \right)

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