4(a+7)=9[a-(5-a)]

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Solution for 4(a+7)=9[a-(5-a)] equation:


Simplifying
4(a + 7) = 9[a + -1(5 + -1a)]

Reorder the terms:
4(7 + a) = 9[a + -1(5 + -1a)]
(7 * 4 + a * 4) = 9[a + -1(5 + -1a)]
(28 + 4a) = 9[a + -1(5 + -1a)]
28 + 4a = 9[a + (5 * -1 + -1a * -1)]
28 + 4a = 9[a + (-5 + 1a)]

Reorder the terms:
28 + 4a = 9[-5 + a + 1a]

Combine like terms: a + 1a = 2a
28 + 4a = 9[-5 + 2a]
28 + 4a = [-5 * 9 + 2a * 9]
28 + 4a = [-45 + 18a]

Solving
28 + 4a = -45 + 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.
28 + 4a + -18a = -45 + 18a + -18a

Combine like terms: 4a + -18a = -14a
28 + -14a = -45 + 18a + -18a

Combine like terms: 18a + -18a = 0
28 + -14a = -45 + 0
28 + -14a = -45

Add '-28' to each side of the equation.
28 + -28 + -14a = -45 + -28

Combine like terms: 28 + -28 = 0
0 + -14a = -45 + -28
-14a = -45 + -28

Combine like terms: -45 + -28 = -73
-14a = -73

Divide each side by '-14'.
a = 5.214285714

Simplifying
a = 5.214285714

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