3/4*(х+2)+2/3+(x-1)=5 Пж срочно

3/4 * (х + 2) + 2/3 + (х - 1) = 5 3/4 *х + 3/2 + 2/3 + х - 1 = 5 1 3/4 *х = 5 - 3/2 - 2/3 + 1 7/4 *х = 6 - 3/2 - 2/3   Умножим левую и правую часть уравнения на 12 21х = 72 - 18 - 8 21х = 46 х = 46/21 х = 2 4/21 Проверка :  3/4 * (2 4/21 + 2)  + 2/3 + (2 4/21 - 1) = 5 3/4 * (4 4/21) + 2/3 + 1 4/21 = 5 3/4 * 88/21 + 2/3 + 25/21 = 5 22/7 + 2/3 + 25/21 = 5  66/21 + 14/21 + 25/21 = 5 105/21 = 5 5 = 5