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1 hour = 60 minutes 3.2 hours = 3.2 x 60 = 192 minutes
x = -32 Solution: -x = 32 -1 * -x = 32 * -1 x = -32
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32 + x = 71 32 - 32 + x = 71 - 32 x = 39
x + 32 = 55 x = 55 - 32 x = 23