If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( a )
a = 0
a = 0
a = 0
a in (-oo:0) U (0:+oo)
15/25 = 6/a // - 6/a
15/25-(6/a) = 0
15/25-6*a^-1 = 0
-6*a^-1 = -3/5 // : -6
a^-1 = 1/10
-1 < 0
1/(a^1) = 1/10 // * a^1
1 = 1/10*a^1 // : 1/10
10 = a^1
a = 10
a = 10
| x-0.8x=162 | | -(3a+2b)+5a-4b= | | -(3a+2b)(5a-4b)= | | 1/5y-1=3/4 | | 100=A*10+5*20+2*30 | | n/4=21/6 | | 5(w-2)=-50 | | -6y-3x=17 | | 2/3-9=1/2x-8 | | (8-x)+(5+x)=100 | | 2/3x9=/2x-8 | | h(x)=((x-1)/(2-x)) | | h(x)=(x-1)/(2-x) | | 2x+3.14+2x+3.14= | | h(x)=x^2-x+4 | | h(x)=9-5x | | -x^3(5x+1)+4x^4= | | 22-(x+5)=5x | | 31pi/180=sin3t | | 22-(x-5)=5x-7 | | 9=In(x+5) | | 4x+5-5x=5-(x+4) | | 8x-2=18x+3 | | -b^3(3b+1)-2b^4= | | 6+7=0 | | 14/1=22/x | | 28/54 | | 3x+7=15-8x-6x-70 | | (11x+5)(6x-7)=0 | | 10u^2-5u^3x^2=0 | | 2(5x-1)^-2/3=8 | | x^2-y^2=-48 |