a*2+b=0

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Solution for a*2+b=0 equation: 


Simplifying
a * 2 + b = 0

Reorder the terms for easier multiplication:
2a + b = 0

Solving
2a + b = 0

Solving for variable 'a'.

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

Add '-1b' to each side of the equation.
2a + b + -1b = 0 + -1b

Combine like terms: b + -1b = 0
2a + 0 = 0 + -1b
2a = 0 + -1b
Remove the zero:
2a = -1b

Divide each side by '2'.
a = -0.5b

Simplifying
a = -0.5b

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