21=7/x

Simple and best practice solution for 21=7/x equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 21=7/x equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

21 = 7/x // - 7/x

21-(7/x) = 0

21-7*x^-1 = 0

-7*x^-1 = -21 // : -7

x^-1 = 3

-1 < 0

1/(x^1) = 3 // * x^1

1 = 3*x^1 // : 3

1/3 = x^1

x = 1/3

x = 1/3

See similar equations:

| -7y+8x=23 | | 5x+2=2x+1+3x | | 0.04(y-8)+0.08y=0.10y-0.01(50) | | 8c=38 | | 5=7x+8+2 | | bx=1-bx | | 4x-40=7(-2n+2) | | 18-5(x-1)=(3x+5)+-6 | | 3-8[8-(8y-4)]= | | 5n-16-n=-10 | | 2a+2a+a+a+a=360 | | r=s+9+p | | 7-y+y=-1 | | -9+v= | | 16-4x=-28 | | 11m-8-m=22 | | -x(3-9)=x(5-13)+6(x+4) | | (4z^3-z^2)+(z^3-3z)= | | 21y-1+135-38=180 | | 470+2x=720 | | 2.5X-8=5X-5 | | -10v+2=70 | | 14z=2/5 | | 6+3x=26 | | Tx+2=11 | | 21y-1+45-38=180 | | X+.15y=32375 | | 3/9y-9=-6 | | 127=-5(-4k+4)+7 | | -7(x+2)=-14-14x | | 6(4+1.5)-2=66 | | 2x+5-6x=-15 |

Equations solver categories