4•15-(17A-75:15-3):4=45
60-(17A-5-3):4=45
60-(17A-8):4=45
240-(17A-8)=180
248-17A+8=180
-17A=180-248
-17A=-68
A=4
(S•17-5•11):15+8•14=114
(17S-55):15+112=114
17S-55+1680=1710
17S+1625=1710
17S=1710-1625
17S=85
S=5
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4•15-(17A-75:15-3):4=45
60-(17A-5-3):4=45
60-(17A-8):4=45
240-(17A-8)=180
248-17A+8=180
-17A=180-248
-17A=-68
A=4
(S•17-5•11):15+8•14=114
(17S-55):15+112=114
17S-55+1680=1710
17S+1625=1710
17S=1710-1625
17S=85
S=5