-(a-90)=

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Solution for -(a-90)= equation:


Simplifying
-1(a + -90) = 0

Reorder the terms:
-1(-90 + a) = 0
(-90 * -1 + a * -1) = 0
(90 + -1a) = 0

Solving
90 + -1a = 0

Solving for variable 'a'.

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

Add '-90' to each side of the equation.
90 + -90 + -1a = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -1a = 0 + -90
-1a = 0 + -90

Combine like terms: 0 + -90 = -90
-1a = -90

Divide each side by '-1'.
a = 90

Simplifying
a = 90

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