If it's not what You are looking for type in the equation solver your own equation and let us solve it.
v in (-oo:+oo)
(7/3)*v = 21 // - 21
(7/3)*v-21 = 0
7/3*v-21 = 0 // + 21
7/3*v = 21 // : 7/3
v = 21/7/3
v = 9
v = 9
| 5y/16+7y/16-3y/16 | | 3(2-8p)-4=-142 | | y^3+5y^2-24y=0 | | 8/5=7/r | | 2x+y=9fory | | -6(3x+6)+7x=-102 | | 3c-14=98 | | 82-u=160 | | 4m-8+9m-1=264 | | p(x)=156-2x | | 9+v=3 | | 10=2.5+5 | | 2(8k+2)-6k=84 | | y^4+9y+20=0 | | 230=161-u | | x^4+9y+20=0 | | x^2+9y+20=0 | | y+3=-5/3x-10/3 | | 4m-7(-3m+5)=115 | | 7=6+u | | 9r^2-16r+9=0 | | 2[7-7(1-n)]+7n=-34+6[6(n+1)-3n] | | 81r^2-16r+64=0 | | 3-8(7n+6)=235 | | 2a-2(1+6a)=-86 | | -7(7a+7)+6a=209 | | 13w-2-6w+14w=103 | | X=3+3+4+5X | | a^2(3a-1)=0 | | -1+2(5n-5)=-81 | | 1/2*3/5 | | 3x-14+y=98 |