If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3*(1/21)
1/21*3
1/7
| 4k^2+12k-16=0 | | cos(3x+10)=sin(2x-5) | | 7x+1=x+16 | | .66x=50000 | | (w-4)(2w+10)(w)-264=0 | | lx-10l=4 | | f(20000)=x^2 | | 3x+2(x-9)=8x+x-2 | | .66x=100000 | | 6x^2=3+7x | | 32=6v-1(2v+8) | | 6x+10y=18 | | 11x^2-6x-16=0 | | .66x=2500 | | 4(2x-8)+2x+8=66 | | 11x^2-6x=16 | | x=.66y | | 88/u=4 | | Q/2-=18 | | cos35=4/x | | 35=-2x-48 | | 9(3x-11)-4=1(x-8)-43 | | -39x+21=64+84x | | 8x+12=5x+27 | | 1x-7=-4x+38 | | 35-5u=-48 | | 9(-4x-16)=12(-6-3x) | | -69=3 | | 6x+37=39 | | 3(y-1)=-2y-8 | | (10x-4y)=(2x+y) | | 3z-8=1 |