8,6/2=x
x=4.3-одна леска
4,3+1=5,3-вторая леска
|CD| = √((2-8)² + (-3-(-11))²) = √(36+64) = 10
<span>(6 7/12-3 17/36)*1/2-4 1/3:13/20=
=(6 21/36 - 3 17/36) *1/2 - 13/3 * 20/13 = 3 4/36 *1/2 - 20/3 =
=3 1/9 *1/2 - 20/3 = 28/9 *1/2 - 20/3 = 14/9 - 20/3 = 14/9 - 60/9= -46/9=
=-5 1/9</span>
13x-9x-15=53
4x-15=53
4x=15+53
4x=68
x=68:4
x=17
А) 3/7+5/14= 6/14+5/14= 11/14
б) 8/9-7/12= 32/36-21/36= 11/36
в) 11/50-4/25+1/5= 11/50-8/50+10/50= 13/50