20=14-2[5a+2]

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Solution for 20=14-2[5a+2] equation:


Simplifying
20 = 14 + -2[5a + 2]

Reorder the terms:
20 = 14 + -2[2 + 5a]
20 = 14 + [2 * -2 + 5a * -2]
20 = 14 + [-4 + -10a]

Combine like terms: 14 + -4 = 10
20 = 10 + -10a

Solving
20 = 10 + -10a

Solving for variable 'a'.

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

Add '10a' to each side of the equation.
20 + 10a = 10 + -10a + 10a

Combine like terms: -10a + 10a = 0
20 + 10a = 10 + 0
20 + 10a = 10

Add '-20' to each side of the equation.
20 + -20 + 10a = 10 + -20

Combine like terms: 20 + -20 = 0
0 + 10a = 10 + -20
10a = 10 + -20

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

Divide each side by '10'.
a = -1

Simplifying
a = -1

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