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a in (-oo:+oo)
a/164.363-10 = 10 // - 10
a/164.363-10-10 = 0
0.00608409*a-20 = 0 // + 20
0.00608409*a = 20 // : 0.00608409
a = 20/0.00608409
a = 3287.26235148
a = 3287.26235148
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