.4A+.3=20

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Solution for .4A+.3=20 equation: 


Simplifying
0.4A + 0.3 = 20

Reorder the terms:
0.3 + 0.4A = 20

Solving
0.3 + 0.4A = 20

Solving for variable 'A'.

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

Add '-0.3' to each side of the equation.
0.3 + -0.3 + 0.4A = 20 + -0.3

Combine like terms: 0.3 + -0.3 = 0.0
0.0 + 0.4A = 20 + -0.3
0.4A = 20 + -0.3

Combine like terms: 20 + -0.3 = 19.7
0.4A = 19.7

Divide each side by '0.4'.
A = 49.25

Simplifying
A = 49.25

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