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/4-17 = 4 // - 4
M/4-17-4 = 0
1/4*M-21 = 0 // + 21
1/4*M = 21 // : 1/4
M = 21/1/4
M = 84
M = 84
| Q/2-4=18 | | 20=sp | | P/3+6=42 | | C/12+12=21 | | 26x-[22x-(30-3x)]=38 | | y/8=z | | C/4+3=5 | | 13/8-25/8 | | 7/8(x+3)=11/8 | | 15x+19y=0 | | 3y-11=-5(y-1) | | 3(y-3)=5y+7 | | 5y-31=-3(y-3) | | w+5=3w+1 | | 3p^2=-10p-3 | | -12x^2-48x+60=0 | | -12x+6*4=30 | | x/3=5/7 | | x-2y^2=-2 | | aw+at-h=y*a | | x/7=9/9 | | M/3+2=17 | | a/3-17=14 | | -37x=-146 | | P/4+13=21 | | x/4=6/8 | | 12(x-5)=6*7 | | 4(b-8)=5(b+3) | | x^2+2x+11= | | -7*(-28+6y)+5y=-1 | | -7*(28+6y)+5y=-1 | | 5x^3-30x=0 |