7a+7=21

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


Simplifying
7a + 7 = 21

Reorder the terms:
7 + 7a = 21

Solving
7 + 7a = 21

Solving for variable 'a'.

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

Add '-7' to each side of the equation.
7 + -7 + 7a = 21 + -7

Combine like terms: 7 + -7 = 0
0 + 7a = 21 + -7
7a = 21 + -7

Combine like terms: 21 + -7 = 14
7a = 14

Divide each side by '7'.
a = 2

Simplifying
a = 2

See similar equations:

| 3z-2z+6=9 | | 8-10x=128-45x | | 12z-15z-6=12 | | 7y-28=14 | | 0=x^2-12x-64 | | 3log(2x+6)=6 | | 4w+4x-y+4w-16x-5y= | | 9(t-2)+5t=7(2t+2)-10 | | 15x-4=7+12x | | 12-5w=3 | | 8y+y-9=9 | | 9/10y-3/10=13/5 | | 5*x^2+14*x-24=0 | | 4x(3x^2)=-1 | | 4x^2-21x=18 | | 15x+18= | | 4(2x-4)-x=-5 | | 5x-10=8x-1 | | 5(5x+4)-3(5x-7)= | | 4x-3y+12w-3y-4w+8x= | | 3/5k+2=8 | | 14x+17=14x-17 | | 6(a+2)=36 | | 25=4b-7 | | 4w+7y+4x+8x-13y+4w= | | 3*1+2y=-6 | | (13b-7)-6(2b+1)=-6 | | 6(4x-4)-4(4x+2)= | | 8z=40+3z | | 3*-1+2y=-6 | | 6x+6y=72 | | 3x+36y=3044 |

Equations solver categories