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x in (-oo:+oo)
(1/2)*(3*x-28) = 5*x // - 5*x
(1/2)*(3*x-28)-(5*x) = 0
(1/2)*(3*x-28)-5*x = 0
1/2*(3*x-28)-5*x = 0
1/2*(3*x-28)-5*x = 0
-7/2*x-14 = 0
-7/2*x-14 = 0
-7/2*x-14 = 0 // + 14
-7/2*x = 14 // : -7/2
x = 14/(-7/2)
x = -4
x = -4
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