Couursehero person a can paint the neighbor's house 6 times as fast as person b. the year a and b worked together, it took them 9 days. how long would it take each to paint the house

Let
x---------> time it takes the person a to paint the house
y---------> time it takes the person b to paint the house

we know that
x=y/6
x+y=9

using a graph tool
see the attached figure

the solution is
x=1.286-------> x=1.3 days
y=7.714-------> y=7.7 days

the answer is
 time it takes the person a to paint the house----> 1.3 days
 time it takes the person a to paint the house----> 7.7 days