If (x + 3) : (4x + 1) is the duplicate ratio of 3 : 5, find the value of x.
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Find the compound ratio of 2 : 3, 9 : 14 and 14 : 27.
Find the compound ratio of 2a : 3b, mn : x2 and x : n
If m : n is the duplicate ratio of m + x : n + x; show that : x2 = mn.
If (3x - 9) : (5x + 4) is the triplicate ratio of 3 : 4, find the value of x.