1)4х+1/3=5х-1/3+15
-х=15-2/3
-х=14 2/3
х=-14 2/3
2)х+3=4х+32
-3х=29
х=-29/3=-9 2/3
3)х+8=4х+1,5
6,5=3х
х=6,5/3=65/30=13/6=2 1/6
4)1/6х=1/8х+4
1/24х=4
х=6
5)х+0,25=0,2х+6
0,8х=5,75
х=5,75/0,8=575/80=115/16=7 3/16
6)1/4+1/6=5/12
1)
<span>{4х-2у=2
</span><span>{2х+у=5 /х2
</span><span>{4х-2у=2
</span><span>{4х+2у=10
</span>8х=12
х=12/8=3/2
4*3/2-2у=2
6-2у=2
-2у=-4
у=2
2)
<span>{3х-у=-1
</span><span>{-х+2у=7 /х3
</span><span>{3х-у=-1
</span>{-3х+6у=21
5у=20
у=4
3х-4=-1
3х=3
х=1
3)
<span>{3х+2у=8
</span><span>{4х-у=7 /х2
</span><span>{3х+2у=8
</span><span>{8х-2у=14
</span>11х=22
х=2
8-у=7
-у=7-8
-у=-1
у=1
4)
<span>{5х-у=7 /х2
</span><span>{3х+2у=-1
</span><span>{10х-2у=14
</span>3х+2у=-1
13х=13
х=1
5-у=7
-у=7-5
-у=2
у=-2
5)
<span>{2х-у=1 /х2
</span><span>{3х+2у=12
</span><span>{4х-2у=2
</span><span>{3х+2у=12
</span>7х=14
х=2
4-у=1
-у=-3
у=3
6)
<span>{4х+у=10
</span><span>{</span>х+3у=-3 /х(-4)
<span>{4х+у=10
</span>{-4х-12у=12
-11у=22
у=-2
х-6=-3
х=3
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