If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b in (-oo:+oo)
b/2.5 = -20 // + 20
b/2.5+20 = 0
0.4*b+20 = 0 // - 20
0.4*b = -20 // : 0.4
b = -20/0.4
b = -50
b = -50
| -0.04x+0.25(x-4)=0.5(x-2) | | 5(x-8)-10(3-x)=7(x-2) | | 3basex+34basex-40basex=0 | | 3(2+5x)=7(3x+2) | | (x^2-6x-15)/(x-8) | | 2x+15x-21=4+5 | | (2*.000001)x=4*-.0000001 | | 7p-9=6p+22 | | 10h-30=50 | | 2x=32/5 | | t/6-5=15 | | 4s^3-500= | | 49t^2-28t+4= | | 17x1/5 | | 48t^2-28t+4= | | 14-4x=5-7x | | 6x-5=27-2x | | 3x-4=-5/2 | | 3x-4=5/2 | | 5(2x-1)=30 | | 7+8x=7+x | | 8x^6-y^15= | | (x-9)(2x+9)= | | 2a+b-3a+b= | | r^3-3r^2+4r-12= | | 5+3c=-20 | | 5a^4b^3-15a^3b^4= | | x^2-6084=6460 | | 6x-9=3x+10 | | 4t^2-8=0 | | 75X-4000-25X-0.1x^2=0 | | ab-4a-4b=80 |