If it's not what You are looking for type in the equation solver your own equation and let us solve it.
f in (-oo:+oo)
(2/3)*f = -4 // + 4
(2/3)*f+4 = 0
2/3*f+4 = 0 // - 4
2/3*f = -4 // : 2/3
f = -4/2/3
f = -6
f = -6
| 4*4+4*4-4+4= | | -16x^2+9.8x+3=0 | | 10-0.5d=0 | | (2n^2-7n+2)*(3n+1)= | | x+47=4x+23 | | 7x+57=2x+12 | | 145+4p=137 | | (-4)(2)(-1)= | | 145+4p=181 | | 145p+4p=181 | | 115+4p=181 | | 4(-7)3= | | (-2)(-1)3= | | 5(-4)(-2)= | | 1/2(d-6)=-7 | | 125000=.07x | | 60/22.9*4= | | 13-(-6)= | | 10.5g=63 | | 13-6= | | -13-(6)= | | 4562/2 | | 20/x-9+5=30/x-9 | | 247+(-247)= | | -64+64= | | -82+(-41)= | | 71+(-32)= | | 11r^2+9pr-9p=0 | | -10-6d=110 | | 7x+8y-6=3 | | -10-6d=50 | | y=1/5x-4 |