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x in (-oo:+oo)
2*x+(5/2)*x+8 = 180 // - 180
2*x+(5/2)*x-180+8 = 0
9/2*x-172 = 0 // + 172
9/2*x = 172 // : 9/2
x = 172/9/2
x = 344/9
x = 344/9
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