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ucenikthl
@ucenikthl
July 2022
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решите уравнение 1)(3-2x)+(4x-5)=(x-3)-(4x-5)
2)-7,2-(2,5x+4,5)=-5x-(1,5x+5,7) ребята , которые разбираются в математике пожалуйста помогите мне очень нужна ваша помощь (
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Санечка69
Verified answer
1)(3 - 2x) + (4x - 5) = (x - 3) - (4x - 5)
3 - 2х + 4х - 5 = х - 3 - 4х + 5
2х - 2 = -3х + 2
2х + 3х = 2 + 2
5х = 4
х = 4 : 5
х = 0,8
2) -7,2 - (2,5x + 4,5) = -5x - (1,5x + 5,7)
-7,2 - 2,5х - 4,5 = -5х - 1,5х - 5,7
-2,5х - 11,7 = -6,5х - 5,7
-2,5х + 6,5х = -5,7 + 11,7
4х = 6
х = 6 : 4
х = 1,5
2 votes
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Answers & Comments
Verified answer
1)(3 - 2x) + (4x - 5) = (x - 3) - (4x - 5)3 - 2х + 4х - 5 = х - 3 - 4х + 5
2х - 2 = -3х + 2
2х + 3х = 2 + 2
5х = 4
х = 4 : 5
х = 0,8
2) -7,2 - (2,5x + 4,5) = -5x - (1,5x + 5,7)
-7,2 - 2,5х - 4,5 = -5х - 1,5х - 5,7
-2,5х - 11,7 = -6,5х - 5,7
-2,5х + 6,5х = -5,7 + 11,7
4х = 6
х = 6 : 4
х = 1,5