If it's not what You are looking for type in the equation solver your own equation and let us solve it.
m in (-oo:+oo)
10/20 = m/30 // - m/30
10/20-(m/30) = 0
1/2-1/30*m = 0 // - 1/2
-1/30*m = -1/2 // : -1/30
m = -1/2/(-1/30)
m = 15
m = 15
| ((log(1/4)9) | | 129/54 | | 81+48= | | 81=48 | | 6-3x=-3+-3 | | 42x+58x+5=17 | | 5(x-3)=3x-19 | | 2xy^2+4y^2-3x=0 | | 2(x-5)=3x+3(x+2) | | 5x=6-x | | 9.89-5.4(10.8)/7.5=x | | u^2=9 | | u^2=-64 | | 32ab-8a-28b+7= | | 5(x+1)=2(3x+2) | | 8x-24y=10 | | 19=-8+d | | 10z^6+9z^5-7z^4-8z^3+5z+3=F(Z) | | (8x+2)+(-9x+1)=0 | | 3x+5+8=112 | | -13=6-k | | 5t^2-80t-245=0 | | log(25/16)^-1/2 | | k-13=5 | | 4y-6y=20 | | 18x^3-30x^2/6x= | | 10x-3=15+x | | 15-4.5x=9+.5x | | (4w+3)(9+w)=0 | | 7(2a+4)=6(4a-2) | | -15=x/-7 | | 5x^2+4-21x=0 |