Question

A 4men&6woomen finish a piece of work in 16 days . Then for finishing same work Howmany days wiil be taken by 2men &9 woomen?

Answer 1

4X+6Y=16 ->©
2X+9Y=?
by substituting
(2x+9y=?)2
4x+18y=2 ->®
4x+6y=16 -4x-18y=-2
->-12y=+14
->y=14/-12
y=-7/6
substitute
4x+6y=16
4x-7=16
4x=16+7
4x=23
x=23/4
x=5.75
therefore days cannot be in negative so
x=5.75 days
or x=6days
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thank u