7a+3=a+21

Simple and best practice solution for 7a+3=a+21 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 7a+3=a+21 equation: 



7a+3=a+21

We move all terms to the left:

7a+3-(a+21)=0

We get rid of parentheses

7a-a-21+3=0

We add all the numbers together, and all the variables

6a-18=0

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

6a=18

a=18/6

a=3

See similar equations:

| 8.13=6.43+x | | 7q-4=8 | | 25x+10=14 | | 4x-52+2x+16=180 | | 2(x+3)=5(2x-5) | | 2x+6-x=4x-3 | | 7x+153=180 | | 4-5x=3x+60 | | 22x+153=180 | | x+74+x+2x-18=180 | | Y=4x+57 | | 6x-5-4x=-15 | | 3x+47=x+17 | | 20n=12=152 | | n-64=14 | | 5(p+1)=7(p-3) | | 14.24n-25=41.92 | | 39=(x^2/5.2) | | 42x2-15=0 | | 2x+30=6x-4 | | 9p^2+18p+38=0 | | 4.4x-4=9.2 | | x=2x-12=90 | | 64=4.75x-2.5 | | 7-(3x-29)^1/4=5 | | 25(x-8)=3 | | 19=y/5-32 | | 4x32+9=117 | | 45=3.14/3*x | | 5a+45=18 | | 17=v/5+16 | | 21=3/4w |

Equations solver categories