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

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


Simplifying
(7a + 9) + (3a + -4) = 0

Reorder the terms:
(9 + 7a) + (3a + -4) = 0

Remove parenthesis around (9 + 7a)
9 + 7a + (3a + -4) = 0

Reorder the terms:
9 + 7a + (-4 + 3a) = 0

Remove parenthesis around (-4 + 3a)
9 + 7a + -4 + 3a = 0

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

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

Combine like terms: 7a + 3a = 10a
5 + 10a = 0

Solving
5 + 10a = 0

Solving for variable 'a'.

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

Add '-5' to each side of the equation.
5 + -5 + 10a = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 10a = 0 + -5
10a = 0 + -5

Combine like terms: 0 + -5 = -5
10a = -5

Divide each side by '10'.
a = -0.5

Simplifying
a = -0.5

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