Solve for t
t=3525
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900-3t+7t=15000
Add 7t to both sides.
900+4t=15000
Combine -3t and 7t to get 4t.
4t=15000-900
Subtract 900 from both sides.
4t=14100
Subtract 900 from 15000 to get 14100.
t=\frac{14100}{4}
Divide both sides by 4.
t=3525
Divide 14100 by 4 to get 3525.
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