80 + (x-43)70 = 570(x-43)70 = 570 - 80(x-43)*70 = 490x - 43 = 490/70x - 43 = 7x = 7 + 43x = 50
Ответ: x = 50.
80 + (x-43)70 = 570
(x-43)70 = 570 - 80
(x-43)*70 = 490
x - 43 = 490/70
x - 43 = 7
x = 7 + 43
x = 50
Ответ: x = 50.