109=a-206

Solution for 109=a-206 equation:

Simplifying
109 = a + -206

Reorder the terms:
109 = -206 + a

Solving
109 = -206 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
109 + -1a = -206 + a + -1a

Combine like terms: a + -1a = 0
109 + -1a = -206 + 0
109 + -1a = -206

Add '-109' to each side of the equation.
109 + -109 + -1a = -206 + -109

Combine like terms: 109 + -109 = 0
0 + -1a = -206 + -109
-1a = -206 + -109

Combine like terms: -206 + -109 = -315
-1a = -315

Divide each side by '-1'.
a = 315

Simplifying
a = 315