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AlexandrIII
@AlexandrIII
July 2022
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5|X|+3=7
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Настяpozitifka1
5x+3=7. 5x=7-3. 5x=4 x= 4/5(дробью пиши только). x=0.8
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OlgaOrlova99
5|х| + 3 = 7
1 случай (х ≥ 0) :
5х + 3 = 7
5х = 7 - 3
5х = 4
х = 4/5
х = 0,8
2 случай (х < 0):
5 × (-х) + 3 = 7
-5х + 3 = 7
-5х = 7 - 3
-5х = 4
х = 4/(-5)
х = -0,8
Ответ: -0,8 ; 0,8
0 votes
Thanks 1
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Answers & Comments
1 случай (х ≥ 0) :
5х + 3 = 7
5х = 7 - 3
5х = 4
х = 4/5
х = 0,8
2 случай (х < 0):
5 × (-х) + 3 = 7
-5х + 3 = 7
-5х = 7 - 3
-5х = 4
х = 4/(-5)
х = -0,8
Ответ: -0,8 ; 0,8