-8=4-(9-a)

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Solution for -8=4-(9-a) equation:


Simplifying
-8 = 4 + -1(9 + -1a)
-8 = 4 + (9 * -1 + -1a * -1)
-8 = 4 + (-9 + 1a)

Combine like terms: 4 + -9 = -5
-8 = -5 + 1a

Solving
-8 = -5 + 1a

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.
-8 + -1a = -5 + 1a + -1a

Combine like terms: 1a + -1a = 0
-8 + -1a = -5 + 0
-8 + -1a = -5

Add '8' to each side of the equation.
-8 + 8 + -1a = -5 + 8

Combine like terms: -8 + 8 = 0
0 + -1a = -5 + 8
-1a = -5 + 8

Combine like terms: -5 + 8 = 3
-1a = 3

Divide each side by '-1'.
a = -3

Simplifying
a = -3

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