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Gek7or
@Gek7or
December 2021
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решите позязя!!!!!4 номера
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irinaorlova2
1)
х-3у=8
2х-у=6
х=8+3у
2(8+3у)-у=6
16+6у-у=6
5у=-10
у=-2
х=8+3*(-2)=2
проверка
2-3*(-2)=8
8=8
2*2-(-2)=6
6=6
2)
х-4у=-1
3х-у=8
х=-1+4у
3(4у-1)-у=8
12у-3-у=8
11у=11
у=1
х=-1+4*1=3
проверка
3-4*1=-1
-1=-1
3*3-1=8
8=8
3)
6х+у=5
2х-3у=-5
у=5-6х
2х-3(5-6х)=-5
2х-15+18х=-5
20х=10
х=10\20=0.5
у=5-6*0,5=5-3=2
проверка
6*0,5+2=5
3+2=5
5=5
2*0,5-3*2=-5
1-6=-5
-5=-5
4)
х-6у=-2
2х+3у=11
х=6у-2
2(6у-2)+3у=11
12у-4+3у=11
15у=15
у=1
х=6*1-2=4
проверка
4-6*1=-2
-2=-2
2*4+3*1=11
11=11
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Answers & Comments
х-3у=8
2х-у=6
х=8+3у
2(8+3у)-у=6
16+6у-у=6
5у=-10
у=-2
х=8+3*(-2)=2
проверка
2-3*(-2)=8
8=8
2*2-(-2)=6
6=6
2)
х-4у=-1
3х-у=8
х=-1+4у
3(4у-1)-у=8
12у-3-у=8
11у=11
у=1
х=-1+4*1=3
проверка
3-4*1=-1
-1=-1
3*3-1=8
8=8
3)
6х+у=5
2х-3у=-5
у=5-6х
2х-3(5-6х)=-5
2х-15+18х=-5
20х=10
х=10\20=0.5
у=5-6*0,5=5-3=2
проверка
6*0,5+2=5
3+2=5
5=5
2*0,5-3*2=-5
1-6=-5
-5=-5
4)
х-6у=-2
2х+3у=11
х=6у-2
2(6у-2)+3у=11
12у-4+3у=11
15у=15
у=1
х=6*1-2=4
проверка
4-6*1=-2
-2=-2
2*4+3*1=11
11=11