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4-((3/5)*x) = 16 // - 16
4-((3/5)*x)-16 = 0
(-3/5)*x-16+4 = 0
-3/5*x-12 = 0 // + 12
-3/5*x = 12 // : -3/5
x = 12/(-3/5)
x = -20
x = -20
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