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)
M/15 = 3 // - 3
M/15-3 = 0
1/15*M-3 = 0 // + 3
1/15*M = 3 // : 1/15
M = 3/1/15
M = 45
M = 45
| 3x+15=2x-8 | | v^2-12v+21=10 | | 1212(6x+22y)=x+y | | 6x^2-29x-75=0 | | Q-16=14 | | D-14=7 | | 7n/11n | | -15x+73=28 | | 2x^2+8x-41=0 | | 2(x+9)=26+3 | | -44+w=37 | | 2x^3-3x^2-7x=0 | | 120-25x=9 | | -4g=-16 | | 180+0.15=312 | | 17x-13y=-11 | | 2+(4+5)= | | v+1=-1 | | c-0.34=2.19 | | n/2-1/18=3/4=5n/6 | | 58=6x-2 | | n/2-1/18=2 | | 2p+(2p-15)+62=180 | | 4n^2-9n-18=6 | | -2x-6=x+1 | | 4y+(y+9)+34=180 | | 9x+3=27+6x | | 4y+(y+9)+34=10 | | X+1=-2x-6 | | 44+(2u)+(u-17)=180 | | 16-18=4(n+2) | | 4x+83=180 |