For what values of x is l x l greater than or equal to x squared?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Could somebody me with this radical simplification?

Find the equation of a line that is perpendicular to line g that contains (p, q). coordinate plane with line g that passes through the points negative 3 comma 6 and 0 comma 5 3x − y = 3p − q 3x + y = q − 3p x − y = p − q x + y = q − p