560
А(3х+5)
В(2х)
АВ=3ед.от.
АВ=|а-в|=|3х+5-2х|=|х+5|
|х+5|=3
х+5=-3 х+5=3
х=-3-5 х=3-5
х=-8 х=-2
561
А(х+3)
В(х-1)
С(х-2)
|(х+3)-(х-1)|=|х+3-х+1|=|3+1|=4-АВ
|(х+3)-(х-2)|=|х+3-х+2|=|3+2|=5-АС
562
А(х+3)
В(х-2)
С(2х+5)
ВА=АС
АВ=|(х+3)-(х-2)|=|х+3-х+2|=|3+2|=|5|=5
АС=|(х+3)-(2х+5)|=|х+3-2х-5|=|-х-2|=|-(х+2)|=х+2
х+2=5
х=5-2
х=3
563
1)1 1/12+3 3/4+х=4,5
4 10/12+х=4 5/10
4 5/6+х=4 1/2
х=4 1/2-4 5/6
х=-1/3
2)-4 1/15-х=6 1/3
х=-4 1/15-6 1/3
х=-10,4
3)х-(7 20/36-5 6/36)=-3,5
х-2 7/12=-3,5
х=-3 1/2+2 7/12
х=-11/12
4)-4 3/5+3 4/7=-1 1/35
х-(-1 1/35)=-8 1/14
х+1 1/35=-8 1/14
х=-8 1/14-1 1/35
х=-9 7/70
х=-9,1