4(x+3.1)=20.8

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Solution for 4(x+3.1)=20.8 equation: 


Simplifying
4(x + 3.1) = 20.8

Reorder the terms:
4(3.1 + x) = 20.8
(3.1 * 4 + x * 4) = 20.8
(12.4 + 4x) = 20.8

Solving
12.4 + 4x = 20.8

Solving for variable 'x'.

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

Add '-12.4' to each side of the equation.
12.4 + -12.4 + 4x = 20.8 + -12.4

Combine like terms: 12.4 + -12.4 = 0.0
0.0 + 4x = 20.8 + -12.4
4x = 20.8 + -12.4

Combine like terms: 20.8 + -12.4 = 8.4
4x = 8.4

Divide each side by '4'.
x = 2.1

Simplifying
x = 2.1

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