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Renata7217
@Renata7217
July 2022
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решите уравнения
решите уравнения:(4,2x + 3,1) - (0,7x - 2,7) = 6,85 - (2,5x - 2,5) - (3,1x - 3,1) = - (1,6 - 1,6x) (3,1x + 3,1) - (1,8x + 1,8) = 1,6x + 1,6
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vadgrant
А)(4,2x + 3,1) - (0,7x - 2,7) = 6,85
4,2х + 3,1 - 0,7х + 2,7 = 6,85
3,5х + 5,8 = 6,85
3,5х = 6,85 - 5,8
3,5х = 1,05
х = 1,05/3,5
х = 0,3
Б)
(2,5x - 2,5) - (3,1x - 3,1) = - (1,6 - 1,6x)
2,5х - 2,5 - 3,1х + 3,1 = -1,6 + 1,6х
2,5х - 3,1х - 1,6х = -1,6 +2,5 - 3,1
-2,2х = -0,4
х = -0,4/-2,2
х = 2
11
В)
(3,1x + 3,1) - (1,8x + 1,8) = 1,6x + 1,6
3,1х + 3,1 - 1,8х - 1,8 = 1,6х + 1,6
3,1х -1,8х -1,6х = 1,6 - 3,1 + 1,8
-0,3х = 0,3
х = -1
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Answers & Comments
4,2х + 3,1 - 0,7х + 2,7 = 6,85
3,5х + 5,8 = 6,85
3,5х = 6,85 - 5,8
3,5х = 1,05
х = 1,05/3,5
х = 0,3
Б)(2,5x - 2,5) - (3,1x - 3,1) = - (1,6 - 1,6x)
2,5х - 2,5 - 3,1х + 3,1 = -1,6 + 1,6х
2,5х - 3,1х - 1,6х = -1,6 +2,5 - 3,1
-2,2х = -0,4
х = -0,4/-2,2
х = 2
11
В)(3,1x + 3,1) - (1,8x + 1,8) = 1,6x + 1,6
3,1х + 3,1 - 1,8х - 1,8 = 1,6х + 1,6
3,1х -1,8х -1,6х = 1,6 - 3,1 + 1,8
-0,3х = 0,3
х = -1