21/r-2r/r=5

Simple and best practice solution for 21/r-2r/r=5 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/r-2r/r=5 equation: 


D( r )

r = 0

r = 0

r = 0

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

21/r-((2*r)/r) = 5 // - 5

21/r-((2*r)/r)-5 = 0

21/r-5-2 = 0

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

r^-1 = 1/3

-1 < 0

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

1 = 1/3*r^1 // : 1/3

3 = r^1

r = 3

r = 3

See similar equations:

| =10-0.4 | | xcosy+ycosx=1 | | 21-2r/r=5 | | 2x+8=23+x | | 9-(3u-1)=9-3u+1 | | 0.08(x-100)=68.5-0.07 | | sin-1(237/2007) | | (x+3)=11 | | -4m+40=-4(4m-4) | | h=-16r^2+48t+32 | | 7+3x-2x=x+7 | | 2xsquared+8x+5=0 | | -4x+6x=2x-7 | | -5(-b+6)=5b-30 | | 3z=2-16 | | (16x-12)/x=10 | | -3(1-5n)=-29+2n | | 7(k-1)=-7-8k | | -91=-7(n+6) | | 4+3(8+5x)=118 | | x+x+y=23 | | -144=3(7n-6)-3n | | 8+p=8 | | -135=-3(5-5x) | | 3+6(x-4)=2x+1 | | -96=-3(3+7r) | | -96=3(3+7r) | | 8.8=1.1x | | -6(8k-7)=90 | | T=700/4x-20 | | 2x-4(3-x)=24 | | 2p+4p=30 |

Equations solver categories