21=2t+3

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Solution for 21=2t+3 equation:



21=2t+3
We move all terms to the left:
21-(2t+3)=0
We get rid of parentheses
-2t-3+21=0
We add all the numbers together, and all the variables
-2t+18=0
We move all terms containing t to the left, all other terms to the right
-2t=-18
t=-18/-2
t=+9

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