.4(a+20)=6

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Solution for .4(a+20)=6 equation: 


Simplifying
0.4(a + 20) = 6

Reorder the terms:
0.4(20 + a) = 6
(20 * 0.4 + a * 0.4) = 6
(8 + 0.4a) = 6

Solving
8 + 0.4a = 6

Solving for variable 'a'.

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

Add '-8' to each side of the equation.
8 + -8 + 0.4a = 6 + -8

Combine like terms: 8 + -8 = 0
0 + 0.4a = 6 + -8
0.4a = 6 + -8

Combine like terms: 6 + -8 = -2
0.4a = -2

Divide each side by '0.4'.
a = -5

Simplifying
a = -5

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