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x in (-oo:+oo)
-481/5 = 7*x+(3/5)*x-5 // - 7*x+(3/5)*x-5
5-(7*x)-((3/5)*x)-481/5 = 0
(-3/5)*x-7*x-481/5+5 = 0
-38/5*x-456/5 = 0 // + 456/5
-38/5*x = 456/5 // : -38/5
x = 456/5/(-38/5)
x = -12
x = -12
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