(20-4)=6-a

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Solution for (20-4)=6-a equation:


Simplifying
(20 + -4) = 6 + -1a

Combine like terms: 20 + -4 = 16
(16) = 6 + -1a
16 = 6 + -1a

Solving
16 = 6 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
16 + a = 6 + -1a + a

Combine like terms: -1a + a = 0
16 + a = 6 + 0
16 + a = 6

Add '-16' to each side of the equation.
16 + -16 + a = 6 + -16

Combine like terms: 16 + -16 = 0
0 + a = 6 + -16
a = 6 + -16

Combine like terms: 6 + -16 = -10
a = -10

Simplifying
a = -10

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