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viviq12338
@viviq12338
August 2022
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Помогите решить
1. (7а-2,8)×(4.9+3,5а)=0
2. (-2а+6,6)×(4,2а-8,4)=0
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Хуqожнuк
1. (7a - 2,8) * (4.9 + 3,5a) = 0
7a - 2.8 = 0
4.9 + 3.5a = 0
a = 2.8/7
a = -4.9/3.5
a = 0.4
a = -1.4
2. (-2a + 6,6) * (4,2a - 8,4) = 0
-2a + 6.6 = 0
4.2a - 8.4 = 0
a = 6.6/2
a = 8.4/4.2
a = 3.3
a = 2
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viviq12338
0,4×(а-4)-0,3×(а-3)=1,7
viviq12338
помогите ещё это,пожалуйста
hokumas
0,4a-1,6-0,3a+0,9=1,7
0,1a-0,7=1,7
0,1a=1,7+0,7
0,1a=2,4
a=24
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Answers & Comments
7a - 2.8 = 0
4.9 + 3.5a = 0
a = 2.8/7
a = -4.9/3.5
a = 0.4
a = -1.4
2. (-2a + 6,6) * (4,2a - 8,4) = 0
-2a + 6.6 = 0
4.2a - 8.4 = 0
a = 6.6/2
a = 8.4/4.2
a = 3.3
a = 2
0,1a-0,7=1,7
0,1a=1,7+0,7
0,1a=2,4
a=24