15,87•(-1,09)+(-5,87)•(-1,09)=(-1,09)•(15,87-5,87)=(-1,09)•10=-10,9
<span>х+3*25=87</span>
<span>х+75=87</span>
<span>х=87-75</span>
<span>х=12</span>
<span>8*17-x=107</span>
<span>136-х=107</span>
<span>136-107=х</span>
<span>х=29</span>
<span> 555:5-х=74</span>
<span>111-х=74</span>
<span>111-74=х</span>
<span>х=37</span>
<span>2х+87=93</span>
<span>2х=93-87</span>
<span>2х=6</span>
<span>х=6:2</span>
<span>х=3</span>
<span>3*(35-х)=63</span>
<span>35-х=63:3</span>
<span>35-х=21</span>
<span>35-21=х</span>
<span>х=14</span>
<span>(120-х):13=8</span>
<span>120-х=8*13</span>
<span>120-х=104</span>
<span>120-104=х</span>
<span>х=16</span>
5/3=1*2/3 А если десятичная то 1.6666666666667
1) 4:8=4/8=1/2
2) 3:9=3/9=1/3
3) 12:10=12/10=1 1/5
4) 8:6=8/6=1 1/3
5) 25:20=25/20=1 1/4
6) 10:15=10/15=2/3
7) 5:25=5/25=1/5
8) 4:16=4/16=1/4