ПОМОГИТЕ!
1) 7 x - 5x = 13;
3)3/2[х]-8,5 +[x]= 0;
2)1,1[х]+4,9[х]=27;
4)12/5[х]-3,8+9/1[х]=0;
1) 7 x - 5x = 13;
3)3/2[х]-8,5 +[x]= 0;
2)1,1[х]+4,9[х]=27;
4)12/5[х]-3,8+9/1[х]=0;
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Answers & Comments
Ответ:
1 2х=13
х=6,5
3.3/2х+х=8,5
2,5х=8,5
х=3,4
2. 6х=27
х=4,5
4.12/5х+9/1х=3,8
2,4х+9х=3,8
11,4х=3,8
х=1/3