0.1x +8 = 0.3x -6
0.1x -0.3x = -8-6
-0.2x = -14
x = -14 / -0.2
x = 70
5x(6x+3y)+3y(2x-4y)-6x(5y-2x)
(6*sin115*cos115)/(sin230)=3sin230/sin230=3