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AlisaLisovna
@AlisaLisovna
August 2022
1
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Очень сложно помогите решить
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Fixytup
1) 3x-2y=11
x+y=12 x=12-y
5x-y=30
5(12-y)-y=30
60-5y-y=30
6y=30
y=30/6
y=5 => x=12-5=7
2) 0,5x=7-y x=(7-y)/0,5=14-y/0,5
6x+1=5y
11y-1=13,5x
11y-1=13,5(14-y/0,5)
11y-1=189-27y
38y=190
y=190/38
y=5 => x=(7-5)/0,5=2/0,5=4
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Answers & Comments
x+y=12 x=12-y
5x-y=30
5(12-y)-y=30
60-5y-y=30
6y=30
y=30/6
y=5 => x=12-5=7
2) 0,5x=7-y x=(7-y)/0,5=14-y/0,5
6x+1=5y
11y-1=13,5x
11y-1=13,5(14-y/0,5)
11y-1=189-27y
38y=190
y=190/38
y=5 => x=(7-5)/0,5=2/0,5=4