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evgenRUS
@evgenRUS
August 2022
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Помогите)
12-2(х+3)=26
-5(0,8х-1,2)=-х+7,2
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prettypushkova
Verified answer
12 - 2(х + 3) = 26
2(х + 3) = 12 - 26
2(х + 3) = - 14
х + 3 = - 14 : 2
х + 3 = - 7
х = - 7 - 3
х = - 10
Проверка: 12 - 2(-10 + 3) = 26
12 - 2 * (-7) = 26
12 + 14 = 26
26 = 26
- 5(0,8х - 1,2) = - х + 7,2
- 4х + 6 = - х + 7,2
- 4х + х = 7,2 - 6
- 3х = 1,2
х = 1,2 : (-3)
х = - 0,4
Проверка: - 5(0,8 * (-0,4) - 1,2) = - (-0,4) + 7,2
- 5 * (-0,32 - 1,2) = 0,4 + 7,2
- 5 * (-1,52) = 7,6
7,6 = 7,6
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Answers & Comments
Verified answer
12 - 2(х + 3) = 262(х + 3) = 12 - 26
2(х + 3) = - 14
х + 3 = - 14 : 2
х + 3 = - 7
х = - 7 - 3
х = - 10
Проверка: 12 - 2(-10 + 3) = 26
12 - 2 * (-7) = 26
12 + 14 = 26
26 = 26
- 5(0,8х - 1,2) = - х + 7,2
- 4х + 6 = - х + 7,2
- 4х + х = 7,2 - 6
- 3х = 1,2
х = 1,2 : (-3)
х = - 0,4
Проверка: - 5(0,8 * (-0,4) - 1,2) = - (-0,4) + 7,2
- 5 * (-0,32 - 1,2) = 0,4 + 7,2
- 5 * (-1,52) = 7,6
7,6 = 7,6