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6140000900
@6140000900
July 2022
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решите системы СРОЧНО
1)2x +3y=-7
x-y=4
2)8x+3y=-21
4x-6y=-18
3)3x-2y=5
5x+4y=1
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snez1111
1)2х+3у=7
Х-у=4/*-2
2х+3у=7
-2х+2у=-8
5у=-1
У=-1/5
Х-(-1/5)=4
Х=19/5
2)8х+3у=-21
4х-6у=-18 /:2
8х+3у=-21
2х+3у=-9
10х=-30
Х=-3
У=1
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Answers & Comments
Х-у=4/*-2
2х+3у=7
-2х+2у=-8
5у=-1
У=-1/5
Х-(-1/5)=4
Х=19/5
2)8х+3у=-21
4х-6у=-18 /:2
8х+3у=-21
2х+3у=-9
10х=-30
Х=-3
У=1