
Bibi H. answered 10/03/16
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x: Number of days it will take Andrew to paint the neighbor's house
y: Number of days it will take Bailey to paint the neighbor's house
Andrew works 2 times faster than Bailey
x = 2y (Equation 1)
When they paint together (x + y) it takes them 7 days: x + y = 7 (Equation 2)
2y + y = 7
3y = 7
y=7/3 = 2-1/3 days
x = 14/3 = 4-2/3 days