Use elimination to solve this system of equations. x-4y=-11 and 5x-7y=-10

X-4y=-11<=> -5x + 20y = 55
                      5x - 7y    = -10
                =>0*x + 13*y = 45 => y =45/13 => x = 4*(45/13) -11 = 180/13 -11 =>
x = 37/13;