4a+5b=20

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Solution for 4a+5b=20 equation: 


Simplifying
4a + 5b = 20

Solving
4a + 5b = 20

Solving for variable 'a'.

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

Add '-5b' to each side of the equation.
4a + 5b + -5b = 20 + -5b

Combine like terms: 5b + -5b = 0
4a + 0 = 20 + -5b
4a = 20 + -5b

Divide each side by '4'.
a = 5 + -1.25b

Simplifying
a = 5 + -1.25b

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