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x in (-oo:+oo)
(-1/2)*x+2 = 49/22 // - 49/22
(-1/2)*x-(49/22)+2 = 0
(-1/2)*x-49/22+2 = 0
-1/2*x-5/22 = 0 // + 5/22
-1/2*x = 5/22 // : -1/2
x = 5/22/(-1/2)
x = -5/11
x = -5/11
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