2(a+9)=5[a-(4-a)]

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Solution for 2(a+9)=5[a-(4-a)] equation:


Simplifying
2(a + 9) = 5[a + -1(4 + -1a)]

Reorder the terms:
2(9 + a) = 5[a + -1(4 + -1a)]
(9 * 2 + a * 2) = 5[a + -1(4 + -1a)]
(18 + 2a) = 5[a + -1(4 + -1a)]
18 + 2a = 5[a + (4 * -1 + -1a * -1)]
18 + 2a = 5[a + (-4 + 1a)]

Reorder the terms:
18 + 2a = 5[-4 + a + 1a]

Combine like terms: a + 1a = 2a
18 + 2a = 5[-4 + 2a]
18 + 2a = [-4 * 5 + 2a * 5]
18 + 2a = [-20 + 10a]

Solving
18 + 2a = -20 + 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.
18 + 2a + -10a = -20 + 10a + -10a

Combine like terms: 2a + -10a = -8a
18 + -8a = -20 + 10a + -10a

Combine like terms: 10a + -10a = 0
18 + -8a = -20 + 0
18 + -8a = -20

Add '-18' to each side of the equation.
18 + -18 + -8a = -20 + -18

Combine like terms: 18 + -18 = 0
0 + -8a = -20 + -18
-8a = -20 + -18

Combine like terms: -20 + -18 = -38
-8a = -38

Divide each side by '-8'.
a = 4.75

Simplifying
a = 4.75

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