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rodionk57
@rodionk57
August 2022
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Даю 20 балов. Решить 93 (а,в)
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DenQ04a
A)
2-x/6 + x+7/15 < 8-x/2;
[(2-x)/6]*5 + [(x+7)/15]*2 < [(8-x)/2]*15 =
= 10-5x+2x+14/30 < 120-15x/30 =
= 24-3x/30<120-15x/30 =
= 24-3x-120+15x/30;
24-3x-120+15x = 0
12x - 96 = 0
12x = 96
x = 96/12 = 8
x < 8
1 votes
Thanks 1
saddatimov
у вас неправильное решение
DenQ04a
Благодарю =)
saddatimov
теперь другое дело :)
saddatimov
A) Умножим обе части неравенства на 30.
v) Умножим обе части на 12.
1 votes
Thanks 1
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Answers & Comments
2-x/6 + x+7/15 < 8-x/2;
[(2-x)/6]*5 + [(x+7)/15]*2 < [(8-x)/2]*15 =
= 10-5x+2x+14/30 < 120-15x/30 =
= 24-3x/30<120-15x/30 =
= 24-3x-120+15x/30;
24-3x-120+15x = 0
12x - 96 = 0
12x = 96
x = 96/12 = 8
x < 8
v) Умножим обе части на 12.