How do you write this equation
(y-18)
y
x
it's inside a triangle

(y-18)(y+x)

u have been provided with:

so for solving it u have to make a equation first so choose wisely now make the equation but how?

first of all take

(y-18)(y+x)

this will be ur equation as both the variables x and y given to u r positive(+) so this can be one equation.