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/(-7) = 13 // - 13
x/(-7)-13 = 0
-1/7*x-13 = 0 // + 13
-1/7*x = 13 // : -1/7
x = 13/(-1/7)
x = -91
x = -91
| (y-1)+(y+5)+(y+6)=34 | | (8-u)(4u-9)=0 | | -4(x+9)-44=3-55 | | 11x=8z-6 | | (16x^2/4y^5)^3 | | 8x-3(4x-7)-5=5(-6x+3)-12 | | 11x-200=9x-50 | | 3x+3-1x=11 | | 3x+12=14x-21 | | 2x-(4+2x)+3=2x+2 | | an=4-1 | | 12x+30+8x-6=11 | | 11x-3=96 | | F(x)=x^3-3x^2-6x+8 | | (5x/y^6)^3 | | (Y-1)+(y+6)+(y+5)=34 | | 49=34-(x-1) | | .125x=.025*5x+.025 | | -4x+7x-8x=0 | | 11x+9y=17 | | 5r+2r-1=-36 | | 7(2n+4)=6(5n+7)+3 | | 3-3=8x+3x | | x/4+1/2=1/8 | | 2z^2=y^2-4x | | .2(x-50)=.4(x+20) | | 3.7x=2.6x+9.9 | | h(x)=x^4+8x^2-1 | | -4x+5x=4 | | 6(x+5)=8x+2-2x+28 | | .4y+.4*10+.6y=2 | | (y+3)(y+3)=9 |