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x in (-oo:+oo)
(1/4)*(10*x-2) = 4 // - 4
(1/4)*(10*x-2)-4 = 0
1/4*(10*x-2)-4 = 0
1/4*(10*x-2)-4 = 0
5/2*x-9/2 = 0
5/2*x-9/2 = 0
5/2*x-9/2 = 0 // + 9/2
5/2*x = 9/2 // : 5/2
x = 9/2/5/2
x = 9/5
x = 9/5
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