2a+21=7-a

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



2a+21=7-a

We move all terms to the left:

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

We add all the numbers together, and all the variables

2a-(-1a+7)+21=0

We get rid of parentheses

2a+1a-7+21=0

We add all the numbers together, and all the variables

3a+14=0

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

3a=-14

a=-14/3

a=-4+2/3

See similar equations:

| x+1=16+2x | | -13x=-10x-12 | | -11x=-10x-14 | | -9+8x=15x+19 | | 8x=-16x | | -8-x-4=4+x | | 5(12-2p)=10p+60 | | 9-7x=-6x+6 | | -10+3-2x=5-8x | | 3+7x=8x+8 | | 9x+24+15x=180 | | 126=3x+2x-1+3x+2x-1 | | -3(d+3d)+4(2d+2)=14 | | 3/5y=-12 | | 0.4-10=0.1(x+20) | | 144=275-w | | -w+271=200 | | 2b-12=b-9 | | -u+60=172 | | -a/4+5=2 | | -a/4+5=3 | | 4P(x)=−2x^2+16x−24 | | 8m^2-15m=0 | | y=10y-1000 | | H(x)=2x^2+4x+16 | | 0.5x+0.5=2.2 | | (21x-7)^2=0 | | 14.95x+16.88(10-x)=157.22 | | (y+2)^2+136=0 | | 5n+6=3n+6+2n | | 7x+17-12×=-38 | | -10x=3-9x |

Equations solver categories