1)14-x=24-11x
14-x-24+11x=0
-10+10x=0
10x=10
x=1
2)6x-12=5x+4
6x-12-5x-4=0
x-16=0
x=16
2sinxcosx = cosx
2sinxcosx - cosx = 0
cosx ( 2sinx - 1 ) = 0
cosx = 0 2sinx - 1 = 0
x = p/2 + pn 2sinx = 1
sinx = 1
x = (-1)^n p\2 + pn
(a-b)×(a+b)-a+b=(a-b)×(a+b+1)