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Rom4ik
[11]
3 years ago
9
Solve x/42=3/7 using two different strategies.
Mathematics
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1
answer:
just olya
[345]
3 years ago
6
0
You can solve this type of question two ways:
First cross multiply:
<u>x </u> = <span><u>3</u>
</span>42 7
(42)(3) = (7)(x)
This becomes :
126 = 7x
To solve for x divide both sides by 7 and you get x = 18
The other way to solve it is to think, what do I need to do to get x all by itself?
Since it's being divided by 42, you need to multiply each side of the equation by 42.
42 * <u>x</u> = <span><u>3</u> * 42
</span> 42 7
This leaves you with x = (42*3)/2
This simplifies to x = 18
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