For solving each pair of equations, use the method of elimination by equating coefficients :

13x + 11y = 70

11x + 13y = 74

If 2x + y = 23 and 4x - y = 19; find the values of x - 3y and 5y - 2x.

If 10y = 7x - 4 and 12x + 18y = 1; find the values of 4x + 6y and 8y - x.