you can't just have /:3 sitting in there. you need a number before the ratio symbol
9-3:1/3+1=9
the equation is y2+y2=x so we can simplify it to 2y2=x and then to 2=x/y2 and then to 2y=x/y bur we don't need to do this because since this equation has two variables it's impossible
Here's something to keep you occupied
\(x(2x+3)-4x(3+1)+7(x+(2-1))=15 so-what-does-x-equal?\)
14.083333333333...
