9(a+10)=7[a-(4-a)]

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Solution for 9(a+10)=7[a-(4-a)] equation:


Simplifying
9(a + 10) = 7[a + -1(4 + -1a)]

Reorder the terms:
9(10 + a) = 7[a + -1(4 + -1a)]
(10 * 9 + a * 9) = 7[a + -1(4 + -1a)]
(90 + 9a) = 7[a + -1(4 + -1a)]
90 + 9a = 7[a + (4 * -1 + -1a * -1)]
90 + 9a = 7[a + (-4 + 1a)]

Reorder the terms:
90 + 9a = 7[-4 + a + 1a]

Combine like terms: a + 1a = 2a
90 + 9a = 7[-4 + 2a]
90 + 9a = [-4 * 7 + 2a * 7]
90 + 9a = [-28 + 14a]

Solving
90 + 9a = -28 + 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.
90 + 9a + -14a = -28 + 14a + -14a

Combine like terms: 9a + -14a = -5a
90 + -5a = -28 + 14a + -14a

Combine like terms: 14a + -14a = 0
90 + -5a = -28 + 0
90 + -5a = -28

Add '-90' to each side of the equation.
90 + -90 + -5a = -28 + -90

Combine like terms: 90 + -90 = 0
0 + -5a = -28 + -90
-5a = -28 + -90

Combine like terms: -28 + -90 = -118
-5a = -118

Divide each side by '-5'.
a = 23.6

Simplifying
a = 23.6

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