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)
x/(-30) = -40 // + 40
x/(-30)+40 = 0
40-1/30*x = 0 // - 40
-1/30*x = -40 // : -1/30
x = -40/(-1/30)
x = 1200
x = 1200
| 24=k(8) | | z/7 | | 3x+1=162 | | 2(x+4)=6x+24 | | z^7-3=4 | | 150+10x=360-20x | | 5(t-3)+t=27 | | 3+8n+3n=2-1 | | 6(r+1)=2(r-2) | | 2/7-3=4 | | 25x^2+16x-2=0 | | (x^2+4x+1)=0 | | 7-2n=n-2 | | x=1+12y | | ax-5ab= | | 2236000+(-17740x)=3500000 | | x-4^(3/2)=27 | | 35y=10 | | y=2z^3-3z^2+4z-6 | | -x/7=-5.1 | | 19/14-5/12= | | ax+8a= | | 66x+35+9x=15(x+4)-25 | | 4*x*(2*x-9)-2*(5*x-6)= | | 4y=0.5(y+5) | | -4x-ay=15 | | 3x-20=60 | | 1x+30=360 | | x-72=-40 | | 6h+12=15 | | 2x^2-13x-8=0 | | 3(4s+4)=60 |