21=7+.45t

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Solution for 21=7+.45t equation: 



21=7+.45t

We move all terms to the left:

21-(7+.45t)=0

We add all the numbers together, and all the variables

-(.45t+7)+21=0

We get rid of parentheses

-.45t-7+21=0

We add all the numbers together, and all the variables

-0.45t+14=0

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

-0.45t=-14

t=-14/-0.45

t=31+0.049999999999999/0.45

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