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19.9t=-9.9
We move all terms to the left:
19.9t-(-9.9)=0
We add all the numbers together, and all the variables
19.9t+9.9=0
We move all terms containing t to the left, all other terms to the right
19.9t=-9.9
t=-9.9/19.9
t=-5.2105263157895/10.473684210526
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