52=a-0.4

Solution for 52=a-0.4 equation:

Simplifying
52 = a + -0.4

Reorder the terms:
52 = -0.4 + a

Solving
52 = -0.4 + 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.
52 + -1a = -0.4 + a + -1a

Combine like terms: a + -1a = 0
52 + -1a = -0.4 + 0
52 + -1a = -0.4

Add '-52' to each side of the equation.
52 + -52 + -1a = -0.4 + -52

Combine like terms: 52 + -52 = 0
0 + -1a = -0.4 + -52
-1a = -0.4 + -52

Combine like terms: -0.4 + -52 = -52.4
-1a = -52.4

Divide each side by '-1'.
a = 52.4

Simplifying
a = 52.4