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14-05-2020
Mathematics

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21. What is the value of x if 5:(3x+2) = 7:(5x-2).
A. 6
B. 5
C.7.

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ronhagrid310 ronhagrid310

14-05-2020

Answer:

5/(3x+2) = 7/(5x-2)

<=>5*(5x-2) = 7*(3x+2) (x is not equal to -3/2 or 2/5)

<=> 25x -10 = 21x +14 (x is not equal to -3/2 or 2/5)

<=> 4x = 24 (x is not equal to -3/2 or 2/5)

<=> x = 6 (valid)

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