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/6+5 = 21 // - 21
M/6-21+5 = 0
1/6*M-16 = 0 // + 16
1/6*M = 16 // : 1/6
M = 16/1/6
M = 96
M = 96
| 20*98.7= | | (1/3)h+(5/4)=(7/12)h+2 | | -1-9=3x+3-2x | | 4a+2b(6a-1)= | | 4x+14=59+x | | 8(-1+m)+3=2(m-5) | | 1.1x+4.9=12.6 | | -75=3x | | (x+3)*(x-2)=120 | | -6x-6(3x-3)= | | (x+3)*(x+2)=120 | | 1.2m=1(2m-12) | | a=10.0-2.0/3.0 | | 4x-3=x-4 | | (3/8)a+5=(1/5) | | 2w-12w=70 | | a=2.0-10.0/3.0 | | 4x^4-12x^3+13x^2-6x-8=0 | | 12x^2-46x+40=0 | | 4p-5+p=-7+5p+2 | | (-7/20)b+2=(8/5) | | 4p-5+p=-7+5x+2 | | 20.4=s/2.5 | | x^2+1x=1x+1 | | -6n+13=-5n-1 | | x^8-18x^4+32=0 | | 3n-7=6(2n-2) | | 1/2x=5/4 | | x+115+70=180 | | 3t+7=5+t+9 | | -1p=1p-4 | | (7/8)w=-16 |