If it's not what You are looking for type in the equation solver your own equation and let us solve it.
y in (-oo:+oo)
84 = y/4 // - y/4
84-(y/4) = 0
84-1/4*y = 0 // - 84
-1/4*y = -84 // : -1/4
y = -84/(-1/4)
y = 336
y = 336
| 100x^4+96x^2+40=0 | | X-(.05x)=417 | | Y/7=5/11 | | 115+9x=147+5x | | 2x+10x=12x | | x^4-7x^3+18x^2-21x+9=0 | | 4x+-8=6x+-12 | | 0.1x+1.5=10 | | 2a=4a^2-5 | | 17y-7=47 | | 40s^2=5s | | 28r^2=4r | | 1.3x-1.75=0.4 | | 2a-a^2=0 | | (x+1)(x-3-2i)(x-3+2i)=0 | | -1.1=1.21 | | 110+7x=125+4x | | -7(t-8)-(t+7)=2 | | a(6a-13)=8 | | 1/2z=14 | | Y-4/8=5/6 | | In(x+4)-In(x)=5 | | 9-5p=6-8p | | 40x+8(2x)=33000 | | 0.5x+0.4y=1.2 | | log(x/10^-2)=6.7 | | 9-5p=6-89 | | 6(8-7x)=-414 | | .6(8-7x)=-414 | | 20=7+9(x) | | 6t^2+-48t+72=0 | | 1.25(x+72)=273.76 |