Решите уравнения: 1) 8-5x+x=16; 2) 4,8x-5,5-x=18,8; 3) 12x-5,9-7,5x+3,2=-4,05; 4)...

Question

Решите уравнения:
1) 8-5x+x=16;
2) 4,8x-5,5-x=18,8;
3) 12x-5,9-7,5x+3,2=-4,05;
4) 9,1x+2-x-6=-52,6.

Answer 1

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Answer 2

1) 8-5x+x=16; 
8-4х=16
-4х=16-8
-4х=8
-х=8:4
-х=2
х= -2
2) 4,8x-5,5-x=18,8;
3.8х=18.8+5.6
3.8х=24.4
х=24.4:3.8
х=6.4 
3) 12x-5,9-7,5x+3,2=-4,05; 
4.5х-2.7= -4.05
4.5х= -4.05+2.7
4.5х= -1.35
х= -1.35:4.5
х= -0.3
4) 9,1x+2-x-6=-52,6.
8.1х-4= -52.6
8.1х= -52.6+4
8.1х=48.6
х=48.6:8.1
х=6