F(x)=4x-12 inverse of given function

Δabc is reflected across line l to form δ alblcl, and a¯¯¯al¯¯¯¯ intersects line l at point d. which equation is not necessarily true?

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10