4a-7a=21

Simple and best practice solution for 4a-7a=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 4a-7a=21 equation: 


Simplifying
4a + -7a = 21

Combine like terms: 4a + -7a = -3a
-3a = 21

Solving
-3a = 21

Solving for variable 'a'.

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

Divide each side by '-3'.
a = -7

Simplifying
a = -7

See similar equations:

| 4(2y+1)=2(17y) | | 9x+16=6x-13 | | 4(2y+1)=2(17-t) | | 13-5y=3 | | 4/16=x/12 | | 15(9c-1)-16=133c+15 | | 3u+7t+9t+u= | | (3x-7)/5-(x-7)/4+(3x+5)/2=1 | | (3x-7)-(x-7)/4+(3x+5)/2=1 | | 7y-14y=-28-35 | | 2x+55=5x-5 | | -2-(-8)=x/4 | | 9x-7=6x+6 | | 4(4c-1)-5=11c+6 | | 20x-5=95 | | 2x+2=-4x+40 | | 10x+8=128 | | 12=22-5x/3 | | 20x+45=245 | | 37-13=4(x-5) | | 9y+6=8y-2 | | 28+4y-6=17y-10-5y | | 32x-16y+36x+12y=112+36 | | 32x-16y=112 | | 2-5/6=2/3 | | Nx+Oy=Pfory | | Nx+Op= | | 66-5x=5x^2 | | -5(2t+5)=-25 | | 5v-6=3v+2 | | 2(f-10)=-14 | | 5c-4=7-(4-c)/3 |

Equations solver categories