Ответ:
2)8-4х=2х-16
-4х-2х=-16-8
-6х=-24
х=-24:(-6)
х=4
4)(8х+3)-(10х+6)=9
8х+3-10х-6=9
8х-10х=-3+6+9
-2х=12
х=12:(-2)
х=-6
6)0,3(6-3у)=4,5-0,8(у-9)
1,8-0,9у=4,5-0,8у+7,2
-0,9у+0,8у=4,5+7,2-1,8
-0,1у=9,9
у=9,9:(-0,1)
у=-99
8)3(х-9)+5(х-4)=1
3х-27+5х-20=1
3х+5х=27+20+1
8х=48
х=48:8
х=6
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Ответ:
2)8-4х=2х-16
-4х-2х=-16-8
-6х=-24
х=-24:(-6)
х=4
4)(8х+3)-(10х+6)=9
8х+3-10х-6=9
8х-10х=-3+6+9
-2х=12
х=12:(-2)
х=-6
6)0,3(6-3у)=4,5-0,8(у-9)
1,8-0,9у=4,5-0,8у+7,2
-0,9у+0,8у=4,5+7,2-1,8
-0,1у=9,9
у=9,9:(-0,1)
у=-99
8)3(х-9)+5(х-4)=1
3х-27+5х-20=1
3х+5х=27+20+1
8х=48
х=48:8
х=6