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if the ratio 25 : 4x = x : 4, what is x?

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if the ratio 25 : 4x = x : 4, what is x?

solving-equations

asked Feb 19, 2014 in ALGEBRA 1 by dkinz Apprentice

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1 Answer

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Given

25 : 4x = x : 4

25 / 4x = x / 4

Crossmultiplication.

25 * 4 = 4 x * x

100 = 4 x ^2

25 = x ^2

√25 = x

± 5 = x

Therefore x = ±5.

Solution : The value of a x is ±5.

answered Mar 26, 2014 by friend Mentor

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