2a+-4b=0

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Solution for 2a+-4b=0 equation: 


Simplifying
2a + -4b = 0

Solving
2a + -4b = 0

Solving for variable 'a'.

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

Add '4b' to each side of the equation.
2a + -4b + 4b = 0 + 4b

Combine like terms: -4b + 4b = 0
2a + 0 = 0 + 4b
2a = 0 + 4b
Remove the zero:
2a = 4b

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

Simplifying
a = 2b

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