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a in (-oo:+oo)
4*(5*a-7) = 192 // - 192
4*(5*a-7)-192 = 0
4*(5*a-7)-192 = 0
20*a-220 = 0
20*a-220 = 0
20*a-220 = 0 // + 220
20*a = 220 // : 20
a = 220/20
a = 11
a = 11
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