2 men and 7 boys can do a piece of work in 4 days the same work is done in 3 days by 4 men and 4 points how long would it take one man and one boy to do it
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men =x
boy = y
2x+7y=4
4x+4y=3
_______
2(2x) +2(7y) = 2(4)
4x+14y=8
4x+4y=3
_______
10y=5
y=1/2
4x +4(1/2)=3
4x+2=3
x=1/4
boy = y
2x+7y=4
4x+4y=3
_______
2(2x) +2(7y) = 2(4)
4x+14y=8
4x+4y=3
_______
10y=5
y=1/2
4x +4(1/2)=3
4x+2=3
x=1/4
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