21-12=13

Simple and best practice solution for 21-12=13 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 21-12=13 equation: 


Simplifying
21 + -12 = 13

Combine like terms: 21 + -12 = 9
9 = 13

Solving
9 = 13

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

See similar equations:

| 3/11=-1x | | x^2+11x=-4 | | -70+6x=-3+56 | | mr=-0.2x+350 | | (4n+9)-(6n+12)=n | | 2x(9x^2+25x)=0 | | 100x/90 | | x^4+y^4=81 | | -9+x=-2+9 | | 5s-11=-25+3s | | 2x^2+kx+15=0 | | Dx+Gy=L | | (4a-10b)(6a+b)= | | (x^4y^9z^0/x^12y^-3)^-3 | | 15r-10r-r+2r+4r+1=11 | | 9s-22=-47+4s | | 1141458x+1706738y=893406754 | | -26+6x=2x+18 | | 8m-4=38+2m | | 12p+3=14 | | 5y-8=4y | | 2x^2-18x+81=0 | | 45-9=46- | | 9u+u-7u+4u-1=13 | | 3p+12=14 | | 650+30(n-10)=750+22(n-12) | | 24=2X+15 | | (6y-2)-4y=2 | | 292=47-y | | t+3-2t=4t+q | | 3n-9=7n+9 | | 3x=-4x-1+5x |

Equations solver categories