Thanks CPhill !
enter from the link below may be it will show
http://s43.radikal.ru/i101/1601/c3/84168694f4a9.jpg
x+6.6=-7
x=-7-6.6
x=-13.6
83%=83/100
1-83/100=17/100 it is probability his unsuccesful try
if the 3 term is succesful so the first 2 terms need to be unsuccesful
so: unsuccesful*ucusuccesful*succesful
17/100*17/100*83/100=0.023987
i think 0.02
1/4:8/12 mean 1/4x12/8
1/4*(12/8) =3/8 =0.375
x*8/100=24
find x
let s say 2*12=24 is the job
2 carpenters in 12 hours doing 24 job
3 carpenters in x hours doing 24 job
2*12=3*x
24=x*3
x=8
-126-181-87-177-181-207-170 = -1129
no physics can t exist without me :)
