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reginaamurr
@reginaamurr
July 2022
1
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Помогите решить уравнения!!!
1) 7,2-(6,2-x)=2,2
2) -5+(a-25)=-4
3) (x+3)-17=-20
4) -(10-b)+23,5=-40,4
Заранее спасибо!!!
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1401Tamara
7,2-(6,2-x)=2,2
7,2 - 6,2 + x = 2,2 1 +x = 2,2
x = 2,2 - 1 = 1,2
2) -5+(a-25)=-4
-5 + a - 25 = -4
- 30 + a = -4 a = 30 - 4= 26
3) (x+3)-17=-20
x + 3 - 17= - 20
x - 14 = - 20 x = -20 + 14 = -6
4) -(10-b)+23,5=-40,4
-10 + b + 23,5 = -40,4
b + 13,5 = -40,4 b = -40,4 - 13,5 = -53,9
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Answers & Comments
7,2 - 6,2 + x = 2,2 1 +x = 2,2
x = 2,2 - 1 = 1,2
2) -5+(a-25)=-4
-5 + a - 25 = -4
- 30 + a = -4 a = 30 - 4= 26
3) (x+3)-17=-20
x + 3 - 17= - 20
x - 14 = - 20 x = -20 + 14 = -6
4) -(10-b)+23,5=-40,4
-10 + b + 23,5 = -40,4
b + 13,5 = -40,4 b = -40,4 - 13,5 = -53,9