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x in (-oo:+oo)
-25 = 7-((2/3)*x) // - 7-((2/3)*x)
(2/3)*x-25-7 = 0
2/3*x-32 = 0 // + 32
2/3*x = 32 // : 2/3
x = 32/2/3
x = 48
x = 48
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