21=4n-7n

Simple and best practice solution for 21=4n-7n 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=4n-7n equation: 



21=4n-7n

We move all terms to the left:

21-(4n-7n)=0

We add all the numbers together, and all the variables

-(-3n)+21=0

We get rid of parentheses

3n+21=0

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

3n=-21

n=-21/3

n=-7

See similar equations:

| 1=-1+n/6 | | -12x+3x-10=3(3x-x)-15+5 | | 5+3(x+-7)=32 | | 2x+12+15x+15=180 | | |3x+12|=9 | | b/2-7=1 | | -7(x+4)+2x=-2(x-5) | | -3+b/2=-5 | | 4x+10=292x+5) | | 0=-0.001x^2+.26x | | 3x+10-x=8+5x-7 | | 40=8+8n | | -94=5-9a | | 18+2x=40 | | 2=-2+n/3 | | 2(8-1)+7(x+5)=-59 | | X^2+72x+144=16/9 | | 18+3x=40 | | 4x+5=2(-2+4) | | 90+n-2+n=180 | | 6(x-9)=4(x-4) | | 36p=p4 | | 1=m/10-1 | | -2=2(h+9)-2 | | 4x+5=-4(x+3) | | 112=9x+4 | | 5x-1+6x=4x-7 | | 9y+5=8y-2 | | X+3+x+x=180 | | b/10+8=10 | | -10+7x-14=20x-50 | | -9+2n=31 |

Equations solver categories