If 2x-1, 5x-6, 6x+2 and 15x-9 are in the proportion, find the value of x
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We know that if a,b,c,d are in proportion, then (a/b) = (c/d) (or) ad = bc.
Given 2x - 1, 5x - 6, 6x + 2, 15x - 9.
= > (2x - 1)(15x - 9) = (5x - 6)(6x + 2)
= > 30x^2 - 18x - 15x + 9 = 30x^2 + 10x - 36x - 12
= > -33x + 9 = -26x - 12
= > -33x + 26x = -12 - 9
= > -7x = -21
= > x = 3.
Therefore, the value of x = 3.
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