Given:
Harry and Terry are to calculate
8−(2+5)8−(2+5)
Harry go the right answer
Terry got 8−2+58−2+5
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Find: H-TH-H
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Solution
First, you have to get Harry’s
answer, H
H = 8−(2+5)8−(2+5)
H = 8−(7)8−(7)
H = 8−56−7
H = -48-7
H = -55
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Then get Harry’s answer, T
 T = 8−2+58−2+5
 T = 6+58-2+5
 T = 64-2+5
 T = 62+5
 T = 67
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Find: H-TH-H
 -55-(67)(-55)-(-55)
 -55-(-3685)-(-55)
 3630+55
3685