X+8=8x-8
x-8x=-8-8
-7x=-16
x=-16/(-7)
x=2.2/7
(x-2)*6 (x+3)*5
-------- - ----------=0
5 6
6x-12-(5x+15)
---------------------=0
30
6x-12-5x-15
-----------------=0
30
x-27
--------=0
30
x-27=0
x=27
Sin(a)=-7/25=-0.28/ ArcSin(a)=-0.2838. Cos(0.2838)=0.96.
1/8- (3/4 - Y) = 2/10 -1/10
1/8 - 3/4 +Y = 1/10
1/8 - 6/8 +Y = 1/10
- 5/8 +Y = 1/10
Y = 1/10+5/8
Y = 4/40 + 25/40
Y= 29/40
5/7 - Х/49 =43/49
35/49 -Х/49 = 43/49
-Х/49=43/49 - 35/49
-Х/49 = 8/49
-Х=8
Х= - 8