If it's not what You are looking for type in the equation solver your own equation and let us solve it.
v in (-oo:+oo)
v/7 = -13 // + 13
v/7+13 = 0
1/7*v+13 = 0 // - 13
1/7*v = -13 // : 1/7
v = -13/1/7
v = -91
v = -91
| 7.4r+9-2r=25.2 | | 7x+7=3-5z | | m=4m+11 | | X+(-56)=-7 | | -12=12m | | 0.25(20)+0.7x=0.6(20+x) | | 5x-4-x=2x-1 | | 7/8y-3 | | 2x+5=-40+7x | | -8h=-56 | | A-(-9)/-2=11 | | 3x+5(-1+x)=-21 | | 8y-8=8y+4 | | 2y-3=2y+y | | -8a-40/40-3a-a^2 | | X-8=-6x+13 | | 15t-3=10 | | 120=4.7x | | Cx=196 | | X^5(x^2-3x+6)= | | b-2-b-2= | | 3(2y+5)+2y=-6 | | log(8x+5)=1+log(x-8) | | 9-3x=66x | | 3+2x+6x=75 | | -3(-x+5)=5(4+2x) | | 17x^2-6x=9 | | 24=-12c | | -7x+8-7x=-160 | | 2s-3=6s-11 | | C/49=196 | | 10x=9+x |