21=7/5u

Simple and best practice solution for 21=7/5u 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=7/5u equation: 



21=7/5u

We move all terms to the left:

21-(7/5u)=0



Domain of the equation: 5u)!=0

u!=0/1

u!=0

u∈R



We add all the numbers together, and all the variables

-(+7/5u)+21=0

We get rid of parentheses

-7/5u+21=0

We multiply all the terms by the denominator


21*5u-7=0

Wy multiply elements

105u-7=0

We move all terms containing u to the left, all other terms to the right

105u=7

u=7/105

u=1/15

See similar equations:

| -10+5j=6j | | 2(3a+5)=3(4a-3)+1 | | -2t=-3t-10 | | 2X-3/4-2x-1/3=1 | | 6x+(x+1)=29 | | 13-4x=39-2x | | 5t+8=t12 | | 90=x+1+6x | | (12-4p)2-4(4)(15-5p)=0 | | 4y=12+4 | | 3y-5=y/10 | | 3x+1=-4/x-2 | | 9x+23=4x=83 | | T=12,5t+8 | | 2x-15=64 | | 0.1(w+5)+2w=0.2(w-4) | | 1/5x+7=-9 | | 2(c+3)=4(c-4) | | 2x/5+6x-2/5=12x+10/5 | | 12-9(t+2)+3t=15(t-1)-21t | | 6(6x+5)=45 | | 6(y-4)+4y=36 | | 3x^2+5-13x=0 | | 4w^2-2w-8=0 | | (x-1)^=9 | | 3(x-4)/2=3(x+12)/10 | | 3x^2-10x+7=3x+2 | | 8k-8+k=-10 | | 3x^2+10x+7=3x+2 | | 66-4x=12-10 | | x+3-x2-6x-9=0 | | 3x+2(x-4)=5(x-6) |

Equations solver categories