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x in (-oo:+oo)
(2*(8*x-1))/7 > 4 // - 4
(2*(8*x-1))/7-4 > 0
(2*(8*x-1))/7+(-4*7)/7 > 0
2*(8*x-1)-4*7 > 0
16*x-30 > 0
(16*x-30)/7 > 0
(16*x-30)/7 > 0 // * 7^2
7*(16*x-30) > 0
( 16*x-30 )
16*x-30 > 0 // + 30
16*x > 30 // : 16
x > 30/16
x > 15/8
( 7 )
7 > 0
x należy do R
(-oo:15/8) (15/8:+oo) 16*x-30 - + 7 + +
x in (15/8:+oo)
(15/8:+oo)
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