-(-10+a)=-10

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Solution for -(-10+a)=-10 equation: 


Simplifying
-1(-10 + a) = -10
(-10 * -1 + a * -1) = -10
(10 + -1a) = -10

Solving
10 + -1a = -10

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-10' to each side of the equation.
10 + -10 + -1a = -10 + -10

Combine like terms: 10 + -10 = 0
0 + -1a = -10 + -10
-1a = -10 + -10

Combine like terms: -10 + -10 = -20
-1a = -20

Divide each side by '-1'.
a = 20

Simplifying
a = 20

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