Пошаговое объяснение:21(x - y) = 48 + 20 x, 21x - 21y = 48 + 20x x - 21y - 48 = 0
19(y + x) = 100 + 12 y 19x + 19y = 100 + 12y 19x + 7y - 100 = 0
19x - 399y - 912 = 0
19x + 7y - 100 = 0 406y = -812 y = -2
x - 21*(-2) - 48 = 0
x + 42 - 48 = 0
x - 6 = 0
x = 6
ответ:( 6 ; -2)
Пошаговое объяснение:21(x - y) = 48 + 20 x, 21x - 21y = 48 + 20x x - 21y - 48 = 0
19(y + x) = 100 + 12 y 19x + 19y = 100 + 12y 19x + 7y - 100 = 0
19x - 399y - 912 = 0
19x + 7y - 100 = 0 406y = -812 y = -2
x - 21*(-2) - 48 = 0
x + 42 - 48 = 0
x - 6 = 0
x = 6
ответ:( 6 ; -2)