80=4a-20

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Solution for 80=4a-20 equation:


Simplifying
80 = 4a + -20

Reorder the terms:
80 = -20 + 4a

Solving
80 = -20 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
80 + -4a = -20 + 4a + -4a

Combine like terms: 4a + -4a = 0
80 + -4a = -20 + 0
80 + -4a = -20

Add '-80' to each side of the equation.
80 + -80 + -4a = -20 + -80

Combine like terms: 80 + -80 = 0
0 + -4a = -20 + -80
-4a = -20 + -80

Combine like terms: -20 + -80 = -100
-4a = -100

Divide each side by '-4'.
a = 25

Simplifying
a = 25

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