21=7n-4n

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



21=7n-4n

We move all terms to the left:

21-(7n-4n)=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:

| (5x-9°)=Q | | 7(x+2)+15=2(1.5x+23)+29 | | 5d+7=4-3d | | 2y+5+2y=25 | | 40=5x-15. | | X/4=x-3/10 | | 154=-8(1+2a)-2(-1+8a) | | 59.50-30.00=x | | 11+2x=50 | | 5=3.05+g | | 2x+14=x-13 | | x(x+6)=180 | | 154=-8(1+2a)-2(-1+8a | | -10=-r-4r | | -8w-8-w=2-8w | | 150=61+x | | 11.6=28.4+4x | | 4x+2=P | | 8n+16.2=1.6-$30.00 | | -8x-4x=15-7x | | 11.5/d=23 | | 7x-43=Q | | -16=-2x-23 | | b/10=-13 | | -12(x+3)=3(6x-2) | | 10x+57=Q | | 16(12x-4)=416 | | –4(x‐26)=200 | | (x+2)(x+3)=x2+4x+13 | | 70+65+45x=180 | | 5(2x+1)+3(x-2)=26 | | -13=-1+n |

Equations solver categories