решить уравнения. заранее спасибо. Created by garibovseymur. matematika-ru

решить уравнения. заранее спасибо...

daneel201344 1) х=4,28-2,1=2,18
2) 3/8х=2.1/8+1.1/4= 3.3/8
х=3.3/8 : 3/8=27/8*8/3=9
3)х=-1,61+0,4=-1,21
4)-2,4-х=-1,92
-х=2.4-1.92
х= -0,48

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gorodni4ev Х-4,28=-2,1
х=-2,1- (-4,28)
х=-2,1+4,28
х=2,18
-1 1/4+3/8х=2 1/8
3/8х=2 1/8 + 1 1/4
3/8х=17/8+5/4=17/8+10/8=27/8
х=27/8 : 3/8 = 27/8 * 8/3=27/3
х=9
1х + 1,61=0,4
х=0,4-1,61
х=-1,21
-2,4-х=-0,8*2,4
-2,4+0,8*2,4=х
2,4*(-1+0,8)=х
2,4*(-0,2)=х
х=-0,48
3*(у-1,3)=-2 1/3
3у-3,9=-2 1/3
3у=-2 1/3 + 3 9/10
3у=-7/3 + 39/10= -70/30 + 117/30=47/30
у=47/30 : 3=47/30 * 1/3=47/90

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