book Maths Puzzle Numerical Ability

suppose a middle school survey is given to find out if eighth graders should graduate a week before other students get out of school. The survey is given only to sixth graders.

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Solve each if domain is( 1,2,3,4,5,6,7,8,9):
(6-v)(1+v)v=0
y(8-y)=0 I need help with my math homework the instructions say

The variables x and y vary directly. Use the given values to write an equation that relates x and y.

x=6 y=18