1,6-5х=2,38: 17
1,6-5х= 0,14
5х=1,6-0,14
5х=1,46
х=1,46:5
х=0,292
<span>3+8 5/12 =11 5/12
10 6/7 -3 =7 6/7
4 2/13 + 5 7/13 =9 9/13
8 7/12 - 4 2/12=4 3/12=4 1/4</span>
Периметр- 7+7+7+7=28
площадь- 7*7=49
1) 245*7 = 1715
2) 348*13 = 1044 + 348 = 4524
3) 283*703 = 849 + 1981 = 198949