25=a-(-3)

Solution for 25=a-(-3) equation:

Simplifying
25 = a + -1(-3)

Multiply -1 * -3
25 = a + 3

Reorder the terms:
25 = 3 + a

Solving
25 = 3 + 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.
25 + -1a = 3 + a + -1a

Combine like terms: a + -1a = 0
25 + -1a = 3 + 0
25 + -1a = 3

Add '-25' to each side of the equation.
25 + -25 + -1a = 3 + -25

Combine like terms: 25 + -25 = 0
0 + -1a = 3 + -25
-1a = 3 + -25

Combine like terms: 3 + -25 = -22
-1a = -22

Divide each side by '-1'.
a = 22

Simplifying
a = 22