SOLVE BY ALGEBRAIC METHOD
Y=3X
1/3X + 1/2y =11
First, please do not use all capitals. Online it is like SHOUTING. Not only is it rude, but it is harder to understand. Thank you.
Substitute 3X for Y in second equation and solve for X. Insert that value into the first equation and solve for Y. Check by inserting both values into the second equation.