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9.8t+12.88=-12.28+6.4t
We move all terms to the left:
9.8t+12.88-(-12.28+6.4t)=0
We add all the numbers together, and all the variables
9.8t-(6.4t-12.28)+12.88=0
We get rid of parentheses
9.8t-6.4t+12.28+12.88=0
We add all the numbers together, and all the variables
3.4t+25.16=0
We move all terms containing t to the left, all other terms to the right
3.4t=-25.16
t=-25.16/3.4
t=-7+1/2.5
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