36+[23+(a-3)x5]:3=57
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2016-04-16 13:13:45
[23+(a-3)x5]:3=57- 36 [23+(a-3)x5]:3=21 23+(a-3)x5 = 21x3 23+(a -3) x5 =63 (a-3) x5 =63 -23 (a-3)x5= 40 a-3 = 40:5 a-3=8 a = 8+3 a =11
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[23+(a-3)x5]:3=57- 36 [23+(a-3)x5]:3=21 23+(a-3)x5 = 21x3 23+(a -3) x5 =63 (a-3) x5 =63 -23 (a-3)x5= 40 a-3 = 40:5 a-3=8 a = 8+3 a =11