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x in (-oo:+oo)
2-((2/7)*x)+4 = 14 // - 14
2-((2/7)*x)-14+4 = 0
(-2/7)*x-14+2+4 = 0
-2/7*x-8 = 0 // + 8
-2/7*x = 8 // : -2/7
x = 8/(-2/7)
x = -28
x = -28
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