x+x(0.5)=21

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Solution for x+x(0.5)=21 equation: 



x+x(0.5)=21

We move all terms to the left:

x+x(0.5)-(21)=0

We multiply parentheses

x+0.5x-21=0

We add all the numbers together, and all the variables

1.5x-21=0

We move all terms containing x to the left, all other terms to the right

1.5x=21

x=21/1.5

x=14

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