3=5a-(4a+9)-(5a+7)

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Solution for 3=5a-(4a+9)-(5a+7) equation:


Simplifying
3 = 5a + -1(4a + 9) + -1(5a + 7)

Reorder the terms:
3 = 5a + -1(9 + 4a) + -1(5a + 7)
3 = 5a + (9 * -1 + 4a * -1) + -1(5a + 7)
3 = 5a + (-9 + -4a) + -1(5a + 7)

Reorder the terms:
3 = 5a + -9 + -4a + -1(7 + 5a)
3 = 5a + -9 + -4a + (7 * -1 + 5a * -1)
3 = 5a + -9 + -4a + (-7 + -5a)

Reorder the terms:
3 = -9 + -7 + 5a + -4a + -5a

Combine like terms: -9 + -7 = -16
3 = -16 + 5a + -4a + -5a

Combine like terms: 5a + -4a = 1a
3 = -16 + 1a + -5a

Combine like terms: 1a + -5a = -4a
3 = -16 + -4a

Solving
3 = -16 + -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
3 + 4a = -16 + -4a + 4a

Combine like terms: -4a + 4a = 0
3 + 4a = -16 + 0
3 + 4a = -16

Add '-3' to each side of the equation.
3 + -3 + 4a = -16 + -3

Combine like terms: 3 + -3 = 0
0 + 4a = -16 + -3
4a = -16 + -3

Combine like terms: -16 + -3 = -19
4a = -19

Divide each side by '4'.
a = -4.75

Simplifying
a = -4.75

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