wmiteach5 wmiteach5

15-10-2017
Mathematics

contestada

[(4x + 15) / 5x)] = 1/2

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altavistard altavistard

15-10-2017

One way in which to approach this problem would be to treat it as an equation of ratios and to cross multiply:

[(4x + 15) / 5x)] = 1/2 could be written as:

4x + 15 1
----------- = ---
5x 2

Then 8x + 30 = 5x

3x = -30, and so x = -10 (answer). Be certain to check this answer through substitution!

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