15=a-5.1

Solution for 15=a-5.1 equation:

Simplifying
15 = a + -5.1

Reorder the terms:
15 = -5.1 + a

Solving
15 = -5.1 + 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.
15 + -1a = -5.1 + a + -1a

Combine like terms: a + -1a = 0
15 + -1a = -5.1 + 0
15 + -1a = -5.1

Add '-15' to each side of the equation.
15 + -15 + -1a = -5.1 + -15

Combine like terms: 15 + -15 = 0
0 + -1a = -5.1 + -15
-1a = -5.1 + -15

Combine like terms: -5.1 + -15 = -20.1
-1a = -20.1

Divide each side by '-1'.
a = 20.1

Simplifying
a = 20.1