12/7=21/x

Simple and best practice solution for 12/7=21/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 12/7=21/x equation: 


D( x )

x = 0

x = 0

x = 0

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

12/7 = 21/x // - 21/x

12/7-(21/x) = 0

12/7-21*x^-1 = 0

-21*x^-1 = -12/7 // : -21

x^-1 = 4/49

-1 < 0

1/(x^1) = 4/49 // * x^1

1 = 4/49*x^1 // : 4/49

49/4 = x^1

x = 49/4

x = 49/4

See similar equations:

| 4x-15+28-6x=-7 | | -6-4(2x+3)=3x+4 | | 12r=2*30 | | 20.5=9.5(7v+3.5) | | 4y^2=7+15y | | 4y^2=7+15 | | -7(-5x+3)=189 | | y=2x-1//3 | | 4logx=1 | | 3m^2+15=0 | | 2-3z=3z+11 | | 7(7-2x)=-91 | | 12x-7/2-3(2x-y)/10=7/10 | | 5x=15-5y | | 2x-8+3x=5(x-3) | | 0.1x^2-4x+55=0.1x^2+x+5 | | x^4+2x^3-4=0 | | -7(5x+5)=70 | | 60x-35-3(2x-y)=7 | | 57=(2x)^2/(1-x)(1-x) | | 12y=3x-11 | | 3(4-3x)=12 | | (-24)-7+64=33 | | 10y-6y+8=-2y-10 | | -4x+8-10=-6(x+2) | | 10y-6y+8=-2y-5 | | 7x-56=6x-30+17 | | x(a-b)+x= | | 4x+5=129 | | 25x+10y=35 | | (-6)-(3x)=30 | | 6+3x+4=6x-8-5 |

Equations solver categories