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x in (-oo:+oo)
(2/7)*x-(1/2) = -41/98 // + -41/98
(2/7)*x-(1/2)-(-41/98) = 0
(2/7)*x-1/2+41/98 = 0
2/7*x-4/49 = 0 // + 4/49
2/7*x = 4/49 // : 2/7
x = 4/49/2/7
x = 2/7
x = 2/7
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