If 3x+4:x+5 is the duplicate ratio of 8:15,find x
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3x+4/x+5=8:15
duplicate means 8×8:15×15
3x+4/x+5=64/225
by cross multiplication
3x+4×225=x+5×64
675x+900=64x+320
675x-64x=900-320
611x=620
×=620÷611
x=1.014
duplicate means 8×8:15×15
3x+4/x+5=64/225
by cross multiplication
3x+4×225=x+5×64
675x+900=64x+320
675x-64x=900-320
611x=620
×=620÷611
x=1.014
rajju3:
Sry it's wrong
Now correct
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