0.2(3х-5)-0.3(х-1)=-0.7
0.6х-1-0.3х+0.3=-0.7
0.6х-0.3х=-0.7+1-0.3
0.3х=0
х=0
X(2) -16x+64-(6-x)(2)=0
x(2) -16x+64-36+12x-x(2) =0
-4x+28=0
x=7
(2)- cтепень)))
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
3-7х/2=12/1
3-7х=24
-7х=21
Х=-3