1) 5÷4=25÷y

1 answer:

5 0

1) $\frac{5}{4}= \frac{25}{y} 
$
5y=100
y=20

2) $\frac{x}{0.6} = \frac{9}{0.5}$
$\frac{10x}{6} = \frac{90}{5}$
50x=540
x=10.8

3) 2x=12
x=6

4) x-7+x
2x-7

5) x-x+4=4

If you need explanation just ask.

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Answer:

Proved

Step-by-step explanation:

From the given parameters, we have:

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To do this, we make use of Pigeonhole principle.

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The principle states that: suppose there are n items in m containers, where $n>m$ , then there is at least one container that contains more than 1 item.