5a+4b=x

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Solution for 5a+4b=x equation: 


Simplifying
5a + 4b = x

Solving
5a + 4b = x

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.
5a + 4b + -4b = -4b + x

Combine like terms: 4b + -4b = 0
5a + 0 = -4b + x
5a = -4b + x

Divide each side by '5'.
a = -0.8b + 0.2x

Simplifying
a = -0.8b + 0.2x

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