.4x+3.91=21.05

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Solution for .4x+3.91=21.05 equation: 


Simplifying
0.4x + 3.91 = 21.05

Reorder the terms:
3.91 + 0.4x = 21.05

Solving
3.91 + 0.4x = 21.05

Solving for variable 'x'.

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

Add '-3.91' to each side of the equation.
3.91 + -3.91 + 0.4x = 21.05 + -3.91

Combine like terms: 3.91 + -3.91 = 0.00
0.00 + 0.4x = 21.05 + -3.91
0.4x = 21.05 + -3.91

Combine like terms: 21.05 + -3.91 = 17.14
0.4x = 17.14

Divide each side by '0.4'.
x = 42.85

Simplifying
x = 42.85

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