2х+3у=5 mx+6y=4 помогите

3*y=5 - 2*xy=(5/3) - (2/3)*xm*x+(6*5/3) - (6*2/3)*x=4m*x + 10-4*x=4m*x - 4*x=-6x*(m - 4)= -6при m = 4