O.25(x-16)=21

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Solution for O.25(x-16)=21 equation: 



.25(O-16)=21

We move all terms to the left:

.25(O-16)-(21)=0

We multiply parentheses

0.25O-4-21=0

We add all the numbers together, and all the variables

0.25O-25=0

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

0.25O=25

O=25/0.25

O=100

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