If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
9/40-((3/5)*x) < 1/2 // - 1/2
9/40-((3/5)*x)-(1/2) < 0
(-3/5)*x+9/40-1/2 < 0
-3/5*x-11/40 < 0 // + 11/40
-3/5*x < 11/40 // : -3/5
x > 11/40/(-3/5)
x > -11/24
x in (-11/24:+oo)
(-11/24:+oo)
| 4.9t-4.1=5.7 | | (2n+5)-(3n+7)+(4n-9)= | | z+51+6z+80=180 | | =6n-5(n+1) | | 20x+d=5cx+3c | | -5ab+7ab+(-9ab)+ab+(-2ab)= | | 6/27=8/x | | 2/9=x/27 | | 25b^2-30b-40=0 | | 6.41x+25=41.0881+5x | | 4x^2-54=-38 | | (554.17*12*30)-(758.89*12*15)= | | 4x^2-54=-38 | | 25x^3=64x | | 2(5x-4)+1=19 | | 1+/7=-3 | | sin^2x-3sinx=4 | | x-8=(-32) | | 4(x+9)=2x+44 | | 9x^3-12x^2+4=0 | | J-42.5+15=125.95 | | 3.89x+27.23=54.46 | | 42.5-J+15=125.95 | | 7/21=x/24 | | x+3.6=5.1 | | (584.61*12*30)-(799.26*12*15)= | | 1/12x-1/12=1/8x+1/6-1/6x | | J+42.5-15=125.95 | | 8p+6q-7(8p-2q+4r)= | | 1/3=7/x | | -9-8x=-7+11 | | 81-36v+4v^2=0 |