x+.4x=126

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Solution for x+.4x=126 equation: 


Simplifying
x + 0.4x = 126

Combine like terms: x + 0.4x = 1.4x
1.4x = 126

Solving
1.4x = 126

Solving for variable 'x'.

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

Divide each side by '1.4'.
x = 90

Simplifying
x = 90

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