124=321+E

Solution for 124=321+E equation:

Simplifying
124 = 321 + E

Solving
124 = 321 + E

Solving for variable 'E'.

Move all terms containing E to the left, all other terms to the right.

Add '-1E' to each side of the equation.
124 + -1E = 321 + E + -1E

Combine like terms: E + -1E = 0
124 + -1E = 321 + 0
124 + -1E = 321

Add '-124' to each side of the equation.
124 + -124 + -1E = 321 + -124

Combine like terms: 124 + -124 = 0
0 + -1E = 321 + -124
-1E = 321 + -124

Combine like terms: 321 + -124 = 197
-1E = 197

Divide each side by '-1'.
E = -197

Simplifying
E = -197