What is the value of x if 2-5-20-x-

Given: 2/5=20/x.2/5=20/xon cross multiplying 5 and x , we get 2x=20× 5.2x=100.on isolating x, we get x=100/2.x=50.Therefore, the value of x is 50 . ...

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Standard VII

Mathematics

Solution of an Equation

What is the v...

Question

What is the value of $x$ if $\frac{2}{5} = \frac{20}{x}$ .

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Solution

Given: $\frac{2}{5} = \frac{20}{x}$ .
$\frac{2}{5} = \frac{20}{x}$
on cross multiplying $5$ and $x$ , we get
$2 x = 20 \times 5$ .
$2 x = 100$ .
on isolating $x$ , we get
$x = \frac{100}{2}$ .
$x = 50$ .
Therefore, the value of $x$ is $50$ .

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