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sizova180602
@sizova180602
July 2022
1
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решите уравнения:
а) -27х + 220 = 5х
б) 7а = -310 + 3а
в) -2х = 16х =5х - 19
г) 25 - 3b = 9 - 5b
д) 3 + 11у = 203 + у
е) 3 * (4х- 8) = 3х - 6
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lerynya1
А
) -27х +220=5х
-27х+ 5х=-220
-22х=-220
х=-220÷(-22)
х =10
б) 7а = - 310 +3а
7а - 3а = -310
4а= - 310
а = - 310 ÷4
а=-77,5
в) -2х +16х =5х - 19
-2х - 5х =- 19 - 16
- 7 х= - 35
х=- 35 ÷ (-7)
х= 5
г) 25 - 3b = 9 - 5b
- 3b+5b = 9-25
2b = -18
b = -18 ÷2
b = -9
д) 3 + 11у = 203 + у
11у- у = 203 -3
10у=200
у= 200÷10
у= 20
е) 3 * (4х- 8) = 3х - 6
4х- 8 - 3х =-6 ÷ 3
4х - 8- 3х = -2
4х - 3х =-2 +8
х= 6
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Answers & Comments
-27х+ 5х=-220
-22х=-220
х=-220÷(-22)
х =10
б) 7а = - 310 +3а
7а - 3а = -310
4а= - 310
а = - 310 ÷4
а=-77,5
в) -2х +16х =5х - 19
-2х - 5х =- 19 - 16
- 7 х= - 35
х=- 35 ÷ (-7)
х= 5
г) 25 - 3b = 9 - 5b
- 3b+5b = 9-25
2b = -18
b = -18 ÷2
b = -9
д) 3 + 11у = 203 + у
11у- у = 203 -3
10у=200
у= 200÷10
у= 20
е) 3 * (4х- 8) = 3х - 6
4х- 8 - 3х =-6 ÷ 3
4х - 8- 3х = -2
4х - 3х =-2 +8
х= 6