Помогите решить!!! 12m-3n=48 7x-8y=56
12m - 3n = 48 12m = 48 + 3n m = 4 + 1/4n 3n = 12m - 48 n = 4m - 16. 7x - 8y = 56 7x = 56 + 8y x = 8 + 8/7y 8y = 7x - 56 y = 7/8x - 7.