a+a+6+a-7=20

Simple and best practice solution for a+a+6+a-7=20 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 a+a+6+a-7=20 equation: 


Simplifying
a + a + 6 + a + -7 = 20

Reorder the terms:
6 + -7 + a + a + a = 20

Combine like terms: 6 + -7 = -1
-1 + a + a + a = 20

Combine like terms: a + a = 2a
-1 + 2a + a = 20

Combine like terms: 2a + a = 3a
-1 + 3a = 20

Solving
-1 + 3a = 20

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '1' to each side of the equation.
-1 + 1 + 3a = 20 + 1

Combine like terms: -1 + 1 = 0
0 + 3a = 20 + 1
3a = 20 + 1

Combine like terms: 20 + 1 = 21
3a = 21

Divide each side by '3'.
a = 7

Simplifying
a = 7

See similar equations:

| 14+8*2= | | x+x+2=22 | | 0.2x+0.3=81 | | 20x^2-14x+2=0 | | -3(9+2x)=-93 | | -x*-x=-4 | | 6u-2=0 | | 6q+15p+4(6q)+8(15p)= | | 6q+15p+4(6q)+8(15)= | | (b-6)+14=100 | | -16=s+71 | | 6x-11=3x+7 | | 2+r-21=14 | | 4(2x+7)=-4 | | 2a^2+3a+6a+9= | | -7+1= | | SA=wh+lw+lh+ls | | y=mx | | 3xy+7y=4y^2-5+2x | | 4x^2-12x+10=0 | | 1+5x=-3x+41 | | 3x^5-111x^4+27x^3=0 | | 24x^2-64x-128=0 | | 4x(x+1)=0 | | 144x^2+216x+108=0 | | q+p+4q+8p= | | 3xy+5x-2=3x^2-7y | | 24x^2+136x+80=0 | | 4x^3-12x^2+10x=0 | | 3x^2-50x-17=0 | | 4y+3x=-12 | | x^2-4x-3=0 |

Equations solver categories