If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
12/0.3 = 0.3*n // - 0.3*n
12/0.3-(0.3*n) = 0
12/0.3-0.3*n = 0
40-0.3*n = 0 // - 40
-0.3*n = -40 // : -0.3
n = -40/(-0.3)
n = 133.33333333
n = 133.33333333
| -3(3n+7)=3 | | 6(3z-1)-2(z+2)=7(z+1) | | 5x=10x-10 | | x+2x-3+4x=116 | | 9x^2+16x+1=0 | | ex+1=0.8 | | 3x+5y=112 | | 5(x)=10(x-10) | | 9x^2-16x+1=0 | | 5(x)=10(x)-10 | | 2b-10=18 | | 2(16.5-x)-x=0 | | 11(8c-1)-18=86c+11 | | 9q+57=12q+100.5 | | 9/21-5/21= | | 6(3z-1)-2(z+4)=5(z+1) | | 4c^2-b^2=0 | | 5(3x+4+2)=65 | | -5+2=-10x | | -5x+2=-10 | | 11(8c-1)-14=86c+11 | | 9+8(x-1)=5-9(x-2) | | 8+5(x-5)=2-4(x-4) | | 1+y= | | 32=2x-0 | | 5x-21=-4x | | 12X^2-640X+6000=0 | | b+2*b=-21 | | 1/7*17/2= | | b*7+4=9*b | | 3X^2-160X+1500=0 | | 1/7×17/2= |