<span>(2x-3)(5x+2)>=(2x-3)(3x-8)
(2x*5x)+(2x*2)(-3*5x)(-3*2)>=(2x*3x)(2x*(-8))((-3)*3x)((-3)*(-8)
10x+4x-15x-6>=6x-16x-9x+8
18x>=14
x>=14/18
x>=2/3
</span>
5^3х-1 * 25^7-5х = 0.2;
5^3х-1 * 5^14-10х = 5^-1;
5^-7х+13 = 5^-1;
-7х+13 = -1;
-7х=-1-13; |(-1);
7х=14;
х=2;
6x+15+6-3=0
6x+18=0
6x=-18
x=-3