(3a+4)+(5a-4)-(2a-6)-(7a+9)=

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Solution for (3a+4)+(5a-4)-(2a-6)-(7a+9)= equation:


Simplifying
(3a + 4) + (5a + -4) + -1(2a + -6) + -1(7a + 9) = 0

Reorder the terms:
(4 + 3a) + (5a + -4) + -1(2a + -6) + -1(7a + 9) = 0

Remove parenthesis around (4 + 3a)
4 + 3a + (5a + -4) + -1(2a + -6) + -1(7a + 9) = 0

Reorder the terms:
4 + 3a + (-4 + 5a) + -1(2a + -6) + -1(7a + 9) = 0

Remove parenthesis around (-4 + 5a)
4 + 3a + -4 + 5a + -1(2a + -6) + -1(7a + 9) = 0

Reorder the terms:
4 + 3a + -4 + 5a + -1(-6 + 2a) + -1(7a + 9) = 0
4 + 3a + -4 + 5a + (-6 * -1 + 2a * -1) + -1(7a + 9) = 0
4 + 3a + -4 + 5a + (6 + -2a) + -1(7a + 9) = 0

Reorder the terms:
4 + 3a + -4 + 5a + 6 + -2a + -1(9 + 7a) = 0
4 + 3a + -4 + 5a + 6 + -2a + (9 * -1 + 7a * -1) = 0
4 + 3a + -4 + 5a + 6 + -2a + (-9 + -7a) = 0

Reorder the terms:
4 + -4 + 6 + -9 + 3a + 5a + -2a + -7a = 0

Combine like terms: 4 + -4 = 0
0 + 6 + -9 + 3a + 5a + -2a + -7a = 0
6 + -9 + 3a + 5a + -2a + -7a = 0

Combine like terms: 6 + -9 = -3
-3 + 3a + 5a + -2a + -7a = 0

Combine like terms: 3a + 5a = 8a
-3 + 8a + -2a + -7a = 0

Combine like terms: 8a + -2a = 6a
-3 + 6a + -7a = 0

Combine like terms: 6a + -7a = -1a
-3 + -1a = 0

Solving
-3 + -1a = 0

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + -1a = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -1a = 0 + 3
-1a = 0 + 3

Combine like terms: 0 + 3 = 3
-1a = 3

Divide each side by '-1'.
a = -3

Simplifying
a = -3

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