Выразить х: ax-bx=c; ax+bx=-c; -ax+b=d; ax-d=bx; ax+b=-d; ax:d=c; a:x=d (d-x):b=c; b:(c-x)=d;

a*x - b*x = c;
x*(a-b )= c;
x = c/(a-b).

a*x + b*x = -c;
x*(a+b) = -c;
x = -c/(a+b).

-a*x + b = d;
-a*x = d-b;
-x = (d-b)/a;
x = (b-d)/a.

a*x - d = b*x;
a*x - b*x = d;
x*(a-b) = d;
x = d/(a-b).

a*x + b = -d;
a*x = -d-b;
x = -(d+b)/a.

a*x/d = c;
a*x = c*d;
x = c*d/a.

a/x = d;
a = d*x;
x = a/d.

(d-x)/b = c;
d - x = c*b;
-x = c*b-d;
x = d-c*d.

b/(c-x) = d;
b = d*(c-x);
b = d*c - d*x;
d*x = d*c - b;
x = (d*c-b)/d.

a*x-b = c;
a*x = c+b;
x = (c+b)/a.