5.2=a-(-1.8)

Solution for 5.2=a-(-1.8) equation:

Simplifying
5.2 = a + -1(-1.8)

Multiply -1 * -1.8
5.2 = a + 1.8

Reorder the terms:
5.2 = 1.8 + a

Solving
5.2 = 1.8 + 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.
5.2 + -1a = 1.8 + a + -1a

Combine like terms: a + -1a = 0
5.2 + -1a = 1.8 + 0
5.2 + -1a = 1.8

Add '-5.2' to each side of the equation.
5.2 + -5.2 + -1a = 1.8 + -5.2

Combine like terms: 5.2 + -5.2 = 0.0
0.0 + -1a = 1.8 + -5.2
-1a = 1.8 + -5.2

Combine like terms: 1.8 + -5.2 = -3.4
-1a = -3.4

Divide each side by '-1'.
a = 3.4

Simplifying
a = 3.4