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)
-30 = m/5-15 // - m/5-15
15-(m/5)-30 = 0
-1/5*m-15 = 0 // + 15
-1/5*m = 15 // : -1/5
m = 15/(-1/5)
m = -75
m = -75
| 20(v+1)-4v=4(4v+1)-13 | | (x+6)=19 | | -5y-5(-6-3y)=0 | | 9p-17=-37+5p | | 7s+12=-58 | | 20x^2+6x^2-7x+1/5x-1 | | 6i/3-I | | -7x+6y=27 | | -4+6n=2 | | (4+i)(4-i)= | | 12(v+4)-4v=2(4v+3)-9 | | log(x)(36)=4 | | x^5-x^4-7x^3+11x^2-8x+12=0 | | (1/2)x^2-x-10=0 | | 7b+29=-5(5-3b)-2 | | -115+x=138-10x | | 70=10t+16t^2 | | (7/3)(4) | | 4x^2-9=-4x | | 84=10t+16t^2 | | (3x-7)/(-2x-6) | | 50x+90y=100 | | (x-5)(x+3)(x+1-3i)(x-1+3i)=0 | | 2g+2g+5=0 | | 6x^3-13x^2-28x=0 | | 16t^2+10t-70=0 | | 6(7-y)=-24 | | 34.3+x=65 | | 3r-4(6r-7)=28-5r | | 6x-2=3x+22 | | -3x+5y= 100 | | 7x+10=5x+30 |