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evgenya1golyanova2
@evgenya1golyanova2
August 2022
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Решите пожалуйста 7 и 8 задание
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kmike21
Verified answer
12-7x≤5+3x
15-6x>11-2x
12-5≤3x+7x
15-11>6x-2x
7≤10x
4>4x
0,7≤x
1>x
Ответ: 0,7≤x<1 или x∈[0,7;1)
x-3y=5
5x+11y=-1
x=5+3y
5(5+3y)+11y=-1
25+15y+11y=-1
26y=-26
y=-1
x=5+3(-1)=5-3=2
Ответ: x=2, y=-1 или (2;-1)
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Answers & Comments
Verified answer
12-7x≤5+3x15-6x>11-2x
12-5≤3x+7x
15-11>6x-2x
7≤10x
4>4x
0,7≤x
1>x
Ответ: 0,7≤x<1 или x∈[0,7;1)
x-3y=5
5x+11y=-1
x=5+3y
5(5+3y)+11y=-1
25+15y+11y=-1
26y=-26
y=-1
x=5+3(-1)=5-3=2
Ответ: x=2, y=-1 или (2;-1)