(a+4)=9[a-(7-1)]

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Solution for (a+4)=9[a-(7-1)] equation:


Simplifying
(a + 4) = 9[a + -1(7 + -1)]

Reorder the terms:
(4 + a) = 9[a + -1(7 + -1)]

Remove parenthesis around (4 + a)
4 + a = 9[a + -1(7 + -1)]

Combine like terms: 7 + -1 = 6
4 + a = 9[a + -1(6)]

Multiply -1 * 6
4 + a = 9[a + -6]

Reorder the terms:
4 + a = 9[-6 + a]
4 + a = [-6 * 9 + a * 9]
4 + a = [-54 + 9a]

Solving
4 + a = -54 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
4 + a + -9a = -54 + 9a + -9a

Combine like terms: a + -9a = -8a
4 + -8a = -54 + 9a + -9a

Combine like terms: 9a + -9a = 0
4 + -8a = -54 + 0
4 + -8a = -54

Add '-4' to each side of the equation.
4 + -4 + -8a = -54 + -4

Combine like terms: 4 + -4 = 0
0 + -8a = -54 + -4
-8a = -54 + -4

Combine like terms: -54 + -4 = -58
-8a = -58

Divide each side by '-8'.
a = 7.25

Simplifying
a = 7.25

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