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x in (-oo:+oo)
99 = 5-((2/3)*x) // - 5-((2/3)*x)
(2/3)*x-5+99 = 0
2/3*x+94 = 0 // - 94
2/3*x = -94 // : 2/3
x = -94/2/3
x = -141
x = -141
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