58x+38x + 38x+3 - 12 = 8340x + 15 - 12 = 8340x + 3 = 8340x = 83 - 340x = 80x = 80 / 40x = 2
Ответ: x = 2
58x+38x + 38x+3 - 12 = 83
40x + 15 - 12 = 83
40x + 3 = 83
40x = 83 - 3
40x = 80
x = 80 / 40
x = 2
Ответ: x = 2