4a+2b=80

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Solution for 4a+2b=80 equation: 


Simplifying
4a + 2b = 80

Solving
4a + 2b = 80

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 = 80 + -2b

Combine like terms: 2b + -2b = 0
4a + 0 = 80 + -2b
4a = 80 + -2b

Divide each side by '4'.
a = 20 + -0.5b

Simplifying
a = 20 + -0.5b

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