21/7=4/x

Simple and best practice solution for 21/7=4/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 21/7=4/x equation: 



21/7=4/x

We move all terms to the left:

21/7-(4/x)=0



Domain of the equation: x)!=0

x!=0/1

x!=0

x∈R



We add all the numbers together, and all the variables

-(+4/x)+21/7=0

We add all the numbers together, and all the variables

-(+4/x)+3=0

We get rid of parentheses

-4/x+3=0

We multiply all the terms by the denominator


3*x-4=0

We add all the numbers together, and all the variables

3x-4=0

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

3x=4

x=4/3

x=1+1/3

See similar equations:

| 3-(x+7)÷2=9 | | 3(4-2)=30+3n | | H(x)=–6x–7 | | x^2–9=16 | | 8-2x=18+5x | | 9(x+3)/2=6x+3 | | H(x)=-x2–6x–7 | | x^2–9=16. | | (3h+4)-6=(5-1.4h) | | 156=-0.8a+176 | | 3=-3(z-20) | | p−75=-59 | | 3=z/8-2 | | -18v-16=-19v | | p−75=–59 | | 2v−2−3v=−12 | | k+16=88 | | (7x-2)+18x(11x-34)=180 | | 2=x^-0.2 | | z–6=5 | | 2=-(g-4) | | 53x+4=180 | | z/–6=5 | | -1-3j=8j-2j-10 | | 6n+3n-8=82 | | 22=0.5x | | v+6/4=4 | | -12=w/3-9 | | G=9/8(p-1) | | 1500=0.3x+0.5x | | 6s=221 | | -8f+3+8f=3 |

Equations solver categories