If it's not what You are looking for type in the equation solver your own equation and let us solve it.
w in (-oo:+oo)
3/10 = (w-3)/4 // - (w-3)/4
3/10-((w-3)/4) = 0
(-1*(w-3))/4+3/10 = 0
(-1*10*(w-3))/(4*10)+(3*4)/(4*10) = 0
3*4-1*10*(w-3) = 0
42-10*w = 0
(42-10*w)/(4*10) = 0
(42-10*w)/(4*10) = 0 // * 4*10
42-10*w = 0
42-10*w = 0 // - 42
-10*w = -42 // : -10
w = -42/(-10)
w = 21/5
w = 21/5
| y=x^3+x^2+20x | | 3+3x=21x | | 3x(x-5)+2(x-7)=0 | | 3/10=w-3/4 | | -27=5(w-7)-7w | | 2x-1-1/x | | 11c-88=13-8c | | 12y-5y=42 | | 6x+79=2080 | | 5x-12=25 | | -0.5y=x-30 | | 8(x+3)+3=-29 | | 12x=11x-1 | | -3x+4(0)=0 | | N/2-9 | | 25=16x^2+35x+5 | | 2x-6/5y=-12 | | 4x+4(x+9)=132 | | 4/3(3.14)(3.5^3) | | 4x+2y+6x-y=180 | | 0.5y=x-30 | | 4/3(3.14)(3.5)^3 | | 14x^2-35x/7x | | 2.5x-7=4.5 | | 11-m=-6 | | 2x+5+2x+3x=2x+5 | | 2x+5+2x+3x=1x+9 | | 2x+5+2x+3x=1x+8 | | 2x+5+2x+3x=1x+7 | | -[3s+2t-(4s+t)-1]= | | a/9.5=8.2 | | 2x+5+2x+3x=1x+6 |