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4t+3t=2-7+12
We move all terms to the left:
4t+3t-(2-7+12)=0
We add all the numbers together, and all the variables
4t+3t-7=0
We add all the numbers together, and all the variables
7t-7=0
We move all terms containing t to the left, all other terms to the right
7t=7
t=7/7
t=1
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