21=7-2n

Simple and best practice solution for 21=7-2n 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=7-2n equation: 



21=7-2n

We move all terms to the left:

21-(7-2n)=0

We add all the numbers together, and all the variables

-(-2n+7)+21=0

We get rid of parentheses

2n-7+21=0

We add all the numbers together, and all the variables

2n+14=0

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

2n=-14

n=-14/2

n=-7

See similar equations:

| 2+6x=3x+17 | | 1=5c+11 | | 12-13y=-3(6y-4)+5y | | 1=q/2+1 | | 3/5x+33=28 | | -9g-26=6g+10+3g | | a+22=220 | | -6m-7=13-8m | | 28=-8u+6(u-3) | | -7k+3k-10=-10(k+1) | | -18=-d/5-14 | | X=42+-2x | | 2x+1½x-20=10+1/2x | | 3(-3y+1)+3y=15 | | 3x+5x=78.75 | | w/5-1.1=-13.6 | | 4x–10=x+14 | | 4t–10=t+14 | | -67+10x=7x+17 | | 8m-40=8(3m+7) | | 9e=-4 | | 4x-120=89-7x | | 4x-39=x+54 | | 16(x-4)^=12 | | 8r+6=(r+3)+3r | | 2x=(2)10 | | -6x-8(6-3x)=6+6(x-5) | | 5v+10=75 | | 8+3x+3-x=3x+1 | | 49=-7(2x+7)+6(6-8x) | | y+1/2=41/4 | | 23=6w |

Equations solver categories