21/7=3/d

Simple and best practice solution for 21/7=3/d 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=3/d equation: 


D( d )

d = 0

d = 0

d = 0

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

21/7 = 3/d // - 3/d

21/7-(3/d) = 0

21/7-3*d^-1 = 0

-3*d^-1 = -3 // : -3

d^-1 = 1

-1 < 0

1/(d^1) = 1 // * d^1

1 = 1*d^1 // : 1

1 = d^1

d = 1

d = 1

See similar equations:

| 7a+3b+2b= | | -25=1/3x-10 | | 50x+20y=10 | | x*x-1=8 | | 3(w+7)+2w=16 | | 13x+9+6x-19=180 | | 30+4x=12x | | 30/50=c/5 | | x^4-6x^2=16 | | x+32+60=180 | | 32=4x+8(x-8) | | X^2-24x+244=0 | | z/8=9/6 | | 100=20+5x | | Log(3x+5)=1 | | 36/j=27/18 | | -7x+6.75=4x | | -57x-22=-47x+43-5x | | x-15y=96 | | 3=5(x+5)+6x | | 3/z=12/16 | | z/-12=-5 | | 2/3x-y=4 | | 2(x+4)+3=9x+2(x+3) | | 5m+3n+4m+9n= | | 2x+4(3x+9)=14x+36 | | 133-10x=x-90-63 | | 0=2x^4+14x^3+24x^2 | | 4x-20=2x(-6) | | 21x+1=1x+6 | | 8(2X+3)(x-4)=0 | | 5.8=z/22 |

Equations solver categories