.83-.25=a

Solution for .83-.25=a equation:

Simplifying
0.83 + -0.25 = a

Combine like terms: 0.83 + -0.25 = 0.58
0.58 = a

Solving
0.58 = 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.
0.58 + -1a = a + -1a

Combine like terms: a + -1a = 0
0.58 + -1a = 0

Add '-0.58' to each side of the equation.
0.58 + -0.58 + -1a = 0 + -0.58

Combine like terms: 0.58 + -0.58 = 0.00
0.00 + -1a = 0 + -0.58
-1a = 0 + -0.58

Combine like terms: 0 + -0.58 = -0.58
-1a = -0.58

Divide each side by '-1'.
a = 0.58

Simplifying
a = 0.58