a*-4+b*-2+c=13

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Solution for a*-4+b*-2+c=13 equation: 


Simplifying
a * -4 + b * -2 + c = 13

Reorder the terms for easier multiplication:
-4a + b * -2 + c = 13

Reorder the terms for easier multiplication:
-4a + -2b + c = 13

Solving
-4a + -2b + c = 13

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.
-4a + -2b + 2b + c = 13 + 2b

Combine like terms: -2b + 2b = 0
-4a + 0 + c = 13 + 2b
-4a + c = 13 + 2b

Add '-1c' to each side of the equation.
-4a + c + -1c = 13 + 2b + -1c

Combine like terms: c + -1c = 0
-4a + 0 = 13 + 2b + -1c
-4a = 13 + 2b + -1c

Divide each side by '-4'.
a = -3.25 + -0.5b + 0.25c

Simplifying
a = -3.25 + -0.5b + 0.25c

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