Which point lies on the graph of y=-2/3x+8

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

This is about circle theorems. someone asap : (

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)