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OpenStudy (anonymous):
2.5h-15=4h
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OpenStudy (anonymous):
H=-10
OpenStudy (anonymous):
\[ 2.5h - 15 = 4h \implies (4-2.5)h = -15 \implies 1.5h = -15 \implies h = - \frac {15}{1.5} = -10. \]
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