6x+1-(4-6x);
6x+1-4+6x;
12x-3;
12x=3;
x=3/12;
x=1/4.
6y-(y-4)=4+5y;
6y-y+4=4+5y;
6y-y+4-4=5y;
5y=5y;
0=0;
y-любое число.
5,6-7y=-4*(2y-0,9)+2,4:
5,6-7y=8y+3,6+2,8;
5,6-7y=-8y+6;
-7y+8y=6-5,6;
y=0,4.
x-0,5=2*(0,3X-0,2);
x-0,5=0,6x-0,4;
x-0,6x=-0.4+0.5;
0.4x=0.1;
x=0,25.