.75x+.75x+.25x=21

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Solution for .75x+.75x+.25x=21 equation: 



.75x+.75x+.25x=21

We move all terms to the left:

.75x+.75x+.25x-(21)=0

We add all the numbers together, and all the variables

1.75x-21=0

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

1.75x=21

x=21/1.75

x=12

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