3x+5x+96=1568
8x =1568 - 96
8x = 1472
x = 1472 : 8
x = 184
проверка: 3 * 184 + 5 * 184 + 96 = 552 + 920 + 96 = 1568
3x+5x+96=1568
8x =1568 - 96
8x = 1472
x = 1472 : 8
x = 184
проверка: 3 * 184 + 5 * 184 + 96 = 552 + 920 + 96 = 1568