(3a-4b-c)-(5a-2b+7c)=

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Solution for (3a-4b-c)-(5a-2b+7c)= equation:


Simplifying
(3a + -4b + -1c) + -1(5a + -2b + 7c) = 0

Remove parenthesis around (3a + -4b + -1c)
3a + -4b + -1c + -1(5a + -2b + 7c) = 0
3a + -4b + -1c + (5a * -1 + -2b * -1 + 7c * -1) = 0
3a + -4b + -1c + (-5a + 2b + -7c) = 0

Reorder the terms:
3a + -5a + -4b + 2b + -1c + -7c = 0

Combine like terms: 3a + -5a = -2a
-2a + -4b + 2b + -1c + -7c = 0

Combine like terms: -4b + 2b = -2b
-2a + -2b + -1c + -7c = 0

Combine like terms: -1c + -7c = -8c
-2a + -2b + -8c = 0

Solving
-2a + -2b + -8c = 0

Solving for variable 'a'.

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

Add '2b' to each side of the equation.
-2a + -2b + 2b + -8c = 0 + 2b

Combine like terms: -2b + 2b = 0
-2a + 0 + -8c = 0 + 2b
-2a + -8c = 0 + 2b
Remove the zero:
-2a + -8c = 2b

Add '8c' to each side of the equation.
-2a + -8c + 8c = 2b + 8c

Combine like terms: -8c + 8c = 0
-2a + 0 = 2b + 8c
-2a = 2b + 8c

Divide each side by '-2'.
a = -1b + -4c

Simplifying
a = -1b + -4c

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