21=2a+7

Simple and best practice solution for 21=2a+7 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=2a+7 equation: 



21=2a+7

We move all terms to the left:

21-(2a+7)=0

We get rid of parentheses

-2a-7+21=0

We add all the numbers together, and all the variables

-2a+14=0

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

-2a=-14

a=-14/-2

a=+7

See similar equations:

| 34x+95=3( | | 13e-6e=14 | | 8c=–7+7c | | 3(2y)+y+2(2y)+3y=180 | | −98=4(−6−6r)−2 | | 7j-6j=19 | | 3.2x-5=3.2x(x-5) | | -4r+10-8=-6 | | 1,050-5k=2050 | | (-8x+8)=(-6x+20) | | 14h-5h+h-8h+4h=18 | | -1=13/7z | | 60=13x-9 | | 2+14=10+b | | 2(6+7y)=108+16 | | 10x-6=12x-22 | | 16r-13r-(-16)r-(-r)=20 | | 9=3z+4z+2 | | 7(-6-7a)=56 | | 17=v/3+9 | | 15p+2p-16p=11 | | 8+v/8=3 | | 21k^2+15k-6=0 | | 15x-15=65 | | 7+5a=a-3a | | 1.5c-1=1.7c-5= | | 8(x+2)+4=4x+6x+18 | | 117=-3(1+4n)-3n | | 3x-5(x+10)=2(x-2)-(x+40) | | 2.5n+10=2.5n+0.5n | | 1-8y=65 | | |2x+10|−6=34 |

Equations solver categories