If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
(1/(-5))*a = -4 // + 4
(1/(-5))*a+4 = 0
4-1/5*a = 0 // - 4
-1/5*a = -4 // : -1/5
a = -4/(-1/5)
a = 20
a = 20
| 12-5(2-x)=12+6x | | -5(3p+n)+3p-15=-12p-10 | | 12=t/11 | | tan30=x/7 | | Y=5x/6 | | tan(30)=x/7 | | y=x^3+5x^2-4x | | log(6x-8)-log(4x)=3 | | 11=c/6 | | 1/x^0.5=2/x^0.5 | | p/8=4 | | 6+4x=20+6 | | w=1.7+2.6xv-6.5+1.2xv | | 6x^2-2x+4=0 | | 4x+6-7x+5= | | 32-10=2+2x | | -3(4r+2)-2(2r-6)-6r= | | 3g+2=4+h+7 | | [3-2x]=11 | | 5(-4x-8)=-9(6x+4)-4 | | 2x-26=x+4 | | 2x+2y-x=9 | | [x+2]-6=16 | | y-x+2x+y=9 | | 3+x-9=10 | | 4w=12(v+10) | | 0.15*0.15=x | | 18x^2-48x-16=0 | | 15-5(2x+3y)= | | 49x^12/7x^9 | | 2(4z-4)-3(z+2)= | | 2x+2+y=12 |