X(.4)+x=7.99

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Solution for X(.4)+x=7.99 equation: 


Simplifying
X(0.4) + x = 7.99

Reorder the terms for easier multiplication:
0.4X + x = 7.99

Solving
0.4X + x = 7.99

Solving for variable 'X'.

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

Add '-1x' to each side of the equation.
0.4X + x + -1x = 7.99 + -1x

Combine like terms: x + -1x = 0
0.4X + 0 = 7.99 + -1x
0.4X = 7.99 + -1x

Divide each side by '0.4'.
X = 19.975 + -2.5x

Simplifying
X = 19.975 + -2.5x

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