15/21=20/y

Simple and best practice solution for 15/21=20/y 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 15/21=20/y equation: 


D( y )

y = 0

y = 0

y = 0

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

15/21 = 20/y // - 20/y

15/21-(20/y) = 0

15/21-20*y^-1 = 0

-20*y^-1 = -5/7 // : -20

y^-1 = 1/28

-1 < 0

1/(y^1) = 1/28 // * y^1

1 = 1/28*y^1 // : 1/28

28 = y^1

y = 28

y = 28

See similar equations:

| 4z=76 | | 2x+1.5y=8.5 | | 3w+4=6w+9 | | 5/2=2/x | | 5-2.50x-1.25x=0 | | 3x^2-12x+9=143 | | 7(n)=2n | | 5-3.75x-1.25x=0 | | 1/4*12-3 | | (12xy^3)/(-4xy) | | -3x-7=-31 | | (3w-4)(7-w)=0 | | (2)(0)=7x | | 2x=(12)(8) | | (200)(1)=5x | | x(2+4)=21 | | 3x-2=-18 | | 2x=(1)(10) | | 4(-3)+3d=-2 | | x/5-3=-13 | | 5c+7d=-8 | | 3r=156 | | W(w-10)=-24 | | -9x+y=35 | | 17x+8=27x-6 | | -8(c-5)=24 | | 3(3)-5(1.4)=2 | | 3y+2=126 | | 2x^2-2=2x | | 6a+5b=18 | | 3(3)-5y=2 | | 3/7=x/105 |

Equations solver categories