14+x=2 2x+x-16=2
8-17x=25
5-x=20+2x
x+21=3-5x
17x-3+x=12-2x+5
2(x-12)=210-7x
(5x-1)2-2x-3=35-3(2x+4)
погите напишите все ответы
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Ответы на вопрос:
14+x=2
x+14-2 = 0
x+12 = 0
x = -12
-
2x+x-16=2
3x-16-2 = 0
3x-18 = 0
x = 18/3
x = 6
-
8-17x=25
-17x+8-25 = 0
-17x-17 = 0
x = -17/17
x = -1
-
5-x=20+2x
5-x-20-2x = 0
-3x-15 = 0
x = -15/3
x = -5
-
x+21=3-5x
x+21-3+5x = 0
6x+18 = 0
x = -18/6
x = -3
-
17x-3+x=12-2x+5
17x-3+x-12+2x-5 = 0
20x-20 = 0
x = 20/20
x = 1
-
2(x-12)=210-7x
2x-24-210+7x = 0
9x-234 = 0
x = 234/9
x = 26
-
(5x-1)^2-2x-3=35-3(2x+4)
25x^2-10x+1-2x-3-35+6x-12 = 0
25x^2-6x-49 = 0
D = b^2-4ac => 36-4*25*(-49) = 36+4900 = 4936 > 0, 2 корня.
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