ответ: 1/3(2а-9)-1/2(5б+4) = 2/3а - 1 - 2,5б
1) 1/3 * 9 = 3, 1/3 * 2а = 2/3а
2) 5б * 1/2 = 2,5б 4 * 1/2 = 2
3) 2/3а - 3 - 2,5б + 2 = 2/3а - 1 - 2,5б
Пошаговое объяснение:
( (1/3*2а) - (1/3*9) ) - (1/2*5б + 1/2*4) =
(2/3а - 9/3) - (5/2б + 4/2) =
2/3а - 3 - 5/2б - 2 =
2/3а - 5 - 5/2б
(2/3*4 1/2) - 5 - (5/2*4/15) = (2/3 * 9/2) - 5 - 20/30 =
9/3 - 5 - 2/3 = 3 - 5 - 2/3 = -2 - 2/3 = - 2 2/3
ответ: 1/3(2а-9)-1/2(5б+4) = 2/3а - 1 - 2,5б
1) 1/3 * 9 = 3, 1/3 * 2а = 2/3а
2) 5б * 1/2 = 2,5б 4 * 1/2 = 2
3) 2/3а - 3 - 2,5б + 2 = 2/3а - 1 - 2,5б
Пошаговое объяснение:
( (1/3*2а) - (1/3*9) ) - (1/2*5б + 1/2*4) =
(2/3а - 9/3) - (5/2б + 4/2) =
2/3а - 3 - 5/2б - 2 =
2/3а - 5 - 5/2б
(2/3*4 1/2) - 5 - (5/2*4/15) = (2/3 * 9/2) - 5 - 20/30 =
9/3 - 5 - 2/3 = 3 - 5 - 2/3 = -2 - 2/3 = - 2 2/3