x+.5x+.25x=21

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Solution for x+.5x+.25x=21 equation: 


Simplifying
x + 0.5x + 0.25x = 21

Combine like terms: x + 0.5x = 1.5x
1.5x + 0.25x = 21

Combine like terms: 1.5x + 0.25x = 1.75x
1.75x = 21

Solving
1.75x = 21

Solving for variable 'x'.

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

Divide each side by '1.75'.
x = 12

Simplifying
x = 12

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