4a-2[a+9]=6

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Solution for 4a-2[a+9]=6 equation:


Simplifying
4a + -2[a + 9] = 6

Reorder the terms:
4a + -2[9 + a] = 6
4a + [9 * -2 + a * -2] = 6
4a + [-18 + -2a] = 6

Reorder the terms:
-18 + 4a + -2a = 6

Combine like terms: 4a + -2a = 2a
-18 + 2a = 6

Solving
-18 + 2a = 6

Solving for variable 'a'.

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

Add '18' to each side of the equation.
-18 + 18 + 2a = 6 + 18

Combine like terms: -18 + 18 = 0
0 + 2a = 6 + 18
2a = 6 + 18

Combine like terms: 6 + 18 = 24
2a = 24

Divide each side by '2'.
a = 12

Simplifying
a = 12

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