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k12k34k56
@k12k34k56
July 2022
1
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1)-7(2-3x)=56
2)(5+7a)•15=-30
Помогите плииииз!!! 99баллов!!!
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Inf777
Verified answer
1) - 7 * ( 2 - 3х) = 56
- 14 + 21х = 56
21х = 56 + 14
21х = 70
х = 70 : 21
х = 3 ц 1/3
---------------------------------------
2) (5+ 7а) * 15 = - 30
75 + 105а = - 30
105а = - 30 - 75
105а = - 105
а = - 105 : 105
а = -1
----------------------------------
2 votes
Thanks 3
k12k34k56
Спасибо)))
Inf777
Пожалуйста:)
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Answers & Comments
Verified answer
1) - 7 * ( 2 - 3х) = 56- 14 + 21х = 56
21х = 56 + 14
21х = 70
х = 70 : 21
х = 3 ц 1/3
---------------------------------------
2) (5+ 7а) * 15 = - 30
75 + 105а = - 30
105а = - 30 - 75
105а = - 105
а = - 105 : 105
а = -1
----------------------------------