4a-2b=-20

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Solution for 4a-2b=-20 equation: 


Simplifying
4a + -2b = -20

Solving
4a + -2b = -20

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 = -20 + 2b

Combine like terms: -2b + 2b = 0
4a + 0 = -20 + 2b
4a = -20 + 2b

Divide each side by '4'.
a = -5 + 0.5b

Simplifying
a = -5 + 0.5b

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