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)
(-3*x-12)/7 = 0
-3*x-12 = 0 // + 12
-3*x = 12 // : -3
x = 12/(-3)
x = -4
x = -4
| (x-7)*(x-3)+10x=30 | | 15x=6x+18 | | x^2+2x-39=6 | | x/12=5/3 | | -10x-30=-15x | | 100=20x-240 | | 8x+2-3x=-2x+8+x | | 100[0.09(q+7)]= | | x/4=46/8 | | 1/3y=m | | -2(x-1)=2(2x+4) | | (-1/3a^3)(-1/9a^7) | | 4mp=2r | | 4mp=2y | | 9+2x=4.5x | | 3y=5x-13 | | 48/12=4/x | | 35x=2y | | 13=sqrt(a^2+144) | | P=11-b+c | | 3+2lnx=13 | | x=6x-17 | | -s=3s^2-2 | | 4-3(2-x)=7 | | ×/8=-9 | | (-4y^4)(5y^3)= | | x+10=46 | | 6x=30+3(x-4) | | -7x-37=-5x-35 | | -(2z-2)-(4z-8)+4=-4(z-9)-(9z+7)+9 | | 69/x=24 | | 5w+15=3w+1 |