.25x+.15(100-x)=21

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Solution for .25x+.15(100-x)=21 equation: 



.25x+.15(100-x)=21

We move all terms to the left:

.25x+.15(100-x)-(21)=0

We add all the numbers together, and all the variables

.25x+.15(-1x+100)-21=0

We multiply parentheses

.25x-0.15x+15-21=0

We add all the numbers together, and all the variables

0.1x-6=0

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

0.1x=6

x=6/0.1

x=60

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