If it's not what You are looking for type in the equation solver your own equation and let us solve it.
z in (-oo:+oo)
(8*(5-z))/7 = z // - z
(8*(5-z))/7-z = 0
(8*(5-z))/7+(7*(-z))/7 = 0
8*(5-z)+7*(-z) = 0
40-15*z = 0
(40-15*z)/7 = 0
(40-15*z)/7 = 0 // * 7
40-15*z = 0
40-15*z = 0 // - 40
-15*z = -40 // : -15
z = -40/(-15)
z = 8/3
z = 8/3
| (0,14)=-3 | | 4(-9+6x)=-300 | | 4(m+9)=-2(m-5) | | 2x(x-4)=1 | | -4x+3y=20 | | 9x+14y=14000 | | 6(8-7x)=426 | | (0,4)m=2 | | 9w=19-28 | | 4(1-2x)=4 | | 6-3x=3x-6 | | 1.8=y/4 | | 6(2x-10)=-72 | | 2(m+7)=3(m+10) | | 4x-22=14 | | 4(1x+7)=48 | | X^2/x-100=50 | | 6x+2=-15 | | 3-5x^2=-9 | | -3(8-2x)=42 | | 3x+3=4+-2x | | -2=t-4 | | 3=g-3 | | 3=g-3g | | 9x-32=4x+7 | | -24=6v | | (4x-2)(7x+12)+(2-4x)(13-25x)=0 | | 4(6x+10)=232 | | 6z+4z=4z+4 | | g-9=-15 | | -2=r-2 | | -20=x-37 |