2t+t=90

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Solution for 2t+t=90 equation: 



2t+t=90

We move all terms to the left:

2t+t-(90)=0

We add all the numbers together, and all the variables

3t-90=0

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

3t=90

t=90/3

t=30

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