4(a+9)=7[a-(3-a)]

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Solution for 4(a+9)=7[a-(3-a)] equation:


Simplifying
4(a + 9) = 7[a + -1(3 + -1a)]

Reorder the terms:
4(9 + a) = 7[a + -1(3 + -1a)]
(9 * 4 + a * 4) = 7[a + -1(3 + -1a)]
(36 + 4a) = 7[a + -1(3 + -1a)]
36 + 4a = 7[a + (3 * -1 + -1a * -1)]
36 + 4a = 7[a + (-3 + 1a)]

Reorder the terms:
36 + 4a = 7[-3 + a + 1a]

Combine like terms: a + 1a = 2a
36 + 4a = 7[-3 + 2a]
36 + 4a = [-3 * 7 + 2a * 7]
36 + 4a = [-21 + 14a]

Solving
36 + 4a = -21 + 14a

Solving for variable 'a'.

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

Add '-14a' to each side of the equation.
36 + 4a + -14a = -21 + 14a + -14a

Combine like terms: 4a + -14a = -10a
36 + -10a = -21 + 14a + -14a

Combine like terms: 14a + -14a = 0
36 + -10a = -21 + 0
36 + -10a = -21

Add '-36' to each side of the equation.
36 + -36 + -10a = -21 + -36

Combine like terms: 36 + -36 = 0
0 + -10a = -21 + -36
-10a = -21 + -36

Combine like terms: -21 + -36 = -57
-10a = -57

Divide each side by '-10'.
a = 5.7

Simplifying
a = 5.7

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