If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
(5/7)*n > 30 // - 30
(5/7)*n-30 > 0
5/7*n-30 > 0 // + 30
5/7*n > 30 // : 5/7
n > 30/5/7
n > 42
n in (42:+oo)
(42:+oo)
| -5y-7=3y+25 | | 21w-6=0 | | 5x+2y+5z-3x+4z-6y= | | x+5-4x-60=90 | | 1-11x=-12 | | 14x+(-15)=-5 | | 4/2.2=6/n | | -20=x^2+12x | | 88=6x+9 | | 12/6=54/n | | 109.3040=3.14*r^2 | | 5/9(f-32)=-18 | | X+(6x+5)=180 | | 3x^3-18=-21 | | x+5-4x-60=180 | | (k-3)-(5-3k)=2(k+1) | | 11+2(2y+5)= | | 2a^2=6a+56 | | N+0=0 | | 9*4+y=100 | | 10d+20=t | | T=35 | | -4y+2=-9-9y | | -x^3+20x^2+100x=20000 | | y=5x+295 | | 10(17x+4)=142 | | x/2.5=2.5 | | 8.79x+9=77.2641+3x | | y=y^2/e^y-2xy | | x+x+73=180 | | -3a/7=-6 | | -8x+40-9=31 |