12=a-5.2

Solution for 12=a-5.2 equation:

Simplifying
12 = a + -5.2

Reorder the terms:
12 = -5.2 + a

Solving
12 = -5.2 + 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.
12 + -1a = -5.2 + a + -1a

Combine like terms: a + -1a = 0
12 + -1a = -5.2 + 0
12 + -1a = -5.2

Add '-12' to each side of the equation.
12 + -12 + -1a = -5.2 + -12

Combine like terms: 12 + -12 = 0
0 + -1a = -5.2 + -12
-1a = -5.2 + -12

Combine like terms: -5.2 + -12 = -17.2
-1a = -17.2

Divide each side by '-1'.
a = 17.2

Simplifying
a = 17.2