3a+5+7=21

Simple and best practice solution for 3a+5+7=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 3a+5+7=21 equation: 



3a+5+7=21

We move all terms to the left:

3a+5+7-(21)=0

We add all the numbers together, and all the variables

3a-9=0

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

3a=9

a=9/3

a=3

See similar equations:

| 3x+x+x+15=180 | | 567=7n(-7n-1) | | 13)9x=6x+9 | | 10x-2=12+8 | | (7x-7)/x=0 | | 4(p-74)=80 | | 4.x+10=50 | | 2(2.2x-3)+11.8=14 | | 7=-2(b+3)+5 | | y+55=48 | | 2x+×=18 | | (2x+9)(x+5)=0 | | -8-4(1+5x)=26 | | 3b+5b=-8 | | 9(z+8)=−9z−72 | | -7(2b-4)=10-10b+20 | | 4(c+1)-6=14 | | 9x-6x+12-6=12 | | 7(z+6)=77 | | 2(c+2)+6=18 | | 6(x+2)-5x=30 | | x+5=16-4 | | t+6=1 | | 2(a-3)=10 | | -5x+7(x+3)=28 | | 0,5r+1,2=-12r+0,5 | | 14+x=131 | | 4(t+2)+2=18 | | 5(p+2)=30 | | 4t+2)+2=18 | | 9x+x-5x=+6+5 | | (8a-2)/3=4a |

Equations solver categories