.25(20-a)=6-a

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Solution for .25(20-a)=6-a equation:


Simplifying
0.25(20 + -1a) = 6 + -1a
(20 * 0.25 + -1a * 0.25) = 6 + -1a
(5 + -0.25a) = 6 + -1a

Solving
5 + -0.25a = 6 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
5 + -0.25a + a = 6 + -1a + a

Combine like terms: -0.25a + a = 0.75a
5 + 0.75a = 6 + -1a + a

Combine like terms: -1a + a = 0
5 + 0.75a = 6 + 0
5 + 0.75a = 6

Add '-5' to each side of the equation.
5 + -5 + 0.75a = 6 + -5

Combine like terms: 5 + -5 = 0
0 + 0.75a = 6 + -5
0.75a = 6 + -5

Combine like terms: 6 + -5 = 1
0.75a = 1

Divide each side by '0.75'.
a = 1.333333333

Simplifying
a = 1.333333333

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