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)
a/(-4) = 12 // - 12
a/(-4)-12 = 0
-1/4*a-12 = 0 // + 12
-1/4*a = 12 // : -1/4
a = 12/(-1/4)
a = -48
a = -48
| x/7=10.9 | | -2=x/-4 | | 25x-9=0 | | x^2+36x+572=0 | | -2/5w=12 | | 4(x-4)x=5(x-4)+4 | | 49/100-x^2=0 | | 5(3x^2-2y^2)+3x(x+3y^2)= | | 4x+x^2=77 | | -2[(m-1)(-3)-1]-(2)=-(-2-4m) | | -4/3c-7/6=-7/2-2c | | 7.99=3.14*2 | | 5(p+9)= | | 1/3(10x-7)=4 | | 4x-4x+24=24 | | -15x+42=3x^2 | | 1.4s=4.2 | | -36.2k=-115.84 | | 2y+3(2y+8x)-3(8y+2x)= | | 5x(5x^2-40x+75)=0 | | 1/25x^2=36 | | 10(9y)= | | 12x+5=9x-6 | | 7.4p=88.8 | | -90=6b | | -0.03q=0.9 | | -6x=144 | | 30x^2+6xy=0 | | V/-8=v+4 | | 1/4x^2=25 | | c=2*3.14 | | 2.4v=21.6 |