(12-3a)+(-7-4a)=

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Solution for (12-3a)+(-7-4a)= equation:


Simplifying
(12 + -3a) + (-7 + -4a) = 0

Remove parenthesis around (12 + -3a)
12 + -3a + (-7 + -4a) = 0

Remove parenthesis around (-7 + -4a)
12 + -3a + -7 + -4a = 0

Reorder the terms:
12 + -7 + -3a + -4a = 0

Combine like terms: 12 + -7 = 5
5 + -3a + -4a = 0

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

Solving
5 + -7a = 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 + -7a = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -7a = 0 + -5
-7a = 0 + -5

Combine like terms: 0 + -5 = -5
-7a = -5

Divide each side by '-7'.
a = 0.7142857143

Simplifying
a = 0.7142857143

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