2(a+10)=9[a-(4-a)]

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Solution for 2(a+10)=9[a-(4-a)] equation:


Simplifying
2(a + 10) = 9[a + -1(4 + -1a)]

Reorder the terms:
2(10 + a) = 9[a + -1(4 + -1a)]
(10 * 2 + a * 2) = 9[a + -1(4 + -1a)]
(20 + 2a) = 9[a + -1(4 + -1a)]
20 + 2a = 9[a + (4 * -1 + -1a * -1)]
20 + 2a = 9[a + (-4 + 1a)]

Reorder the terms:
20 + 2a = 9[-4 + a + 1a]

Combine like terms: a + 1a = 2a
20 + 2a = 9[-4 + 2a]
20 + 2a = [-4 * 9 + 2a * 9]
20 + 2a = [-36 + 18a]

Solving
20 + 2a = -36 + 18a

Solving for variable 'a'.

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

Add '-18a' to each side of the equation.
20 + 2a + -18a = -36 + 18a + -18a

Combine like terms: 2a + -18a = -16a
20 + -16a = -36 + 18a + -18a

Combine like terms: 18a + -18a = 0
20 + -16a = -36 + 0
20 + -16a = -36

Add '-20' to each side of the equation.
20 + -20 + -16a = -36 + -20

Combine like terms: 20 + -20 = 0
0 + -16a = -36 + -20
-16a = -36 + -20

Combine like terms: -36 + -20 = -56
-16a = -56

Divide each side by '-16'.
a = 3.5

Simplifying
a = 3.5

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