1) (1 1/12 + 3,75) - (-x) = 4,5Преобразуем дроби к общему знаменателю:(13/12 + 375/100) + x = 45/10(1300/1200 + 375/100) + x = 45/10(1300/1200 + 900/200) + x = 45/10(2600/2400 + 900/200) + x = 45/10(3500/2400) + x = 45/103500/2400 + x = 9/23500/2400 + x = 9/2
2) x - (7 5/9 - 5 1/6) = -3,5Преобразуем дроби к общему знаменателю:x - (72/9 - 31/6) = -3,5x - (8 - 31/6) = -3,5x - (48/6 - 31/6) = -3,5x - (17/6) = -3,5x - 17/6 = -3,5x = -3,5 + 17/6x = -7/2 + 17/6x = - 21/6 + 17/6x = -4/6x = -2/3
1) (1 1/12 + 3,75) - (-x) = 4,5
Преобразуем дроби к общему знаменателю:
(13/12 + 375/100) + x = 45/10
(1300/1200 + 375/100) + x = 45/10
(1300/1200 + 900/200) + x = 45/10
(2600/2400 + 900/200) + x = 45/10
(3500/2400) + x = 45/10
3500/2400 + x = 9/2
3500/2400 + x = 9/2
2) x - (7 5/9 - 5 1/6) = -3,5
Преобразуем дроби к общему знаменателю:
x - (72/9 - 31/6) = -3,5
x - (8 - 31/6) = -3,5
x - (48/6 - 31/6) = -3,5
x - (17/6) = -3,5
x - 17/6 = -3,5
x = -3,5 + 17/6
x = -7/2 + 17/6
x = - 21/6 + 17/6
x = -4/6
x = -2/3