21a+42=

Simple and best practice solution for 21a+42= 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 21a+42= equation:


21a+42=0

We simplify the equation to the form, which is simple to understand 
21a+42=0

We move all terms containing a to the left and all other terms to the right. 
+21a=0-42

We simplify left and right side of the equation. 
+21a=-42

We divide both sides of the equation by 21 to get a. 
a=-2

See similar equations:

| 2cos^2x-3cosx=0 | | 2x^2=36x | | (4x+12)(6x-6)=0 | | (4x+142)(6x-6)=0 | | 7a+16+a-20= | | -13-x=0 | | 2x^2=13x-11 | | -9x-126=0 | | x^3=87 | | 3(2-x)-4=5x-4 | | 58-29x=0 | | 2a+1=256 | | (2x+1)(x-4)+(x-2)=3x(x+2) | | 2(x+8)-(x+6)= | | (1.38/3.785)=(1/x) | | x+7x-4x+2x= | | 5x-6x-(3x+6)= | | -6+15x=-3(-5x+2) | | x^3+x+x^2+1=0 | | 7(1)-5(2)=-3 | | x^3+x+x^2=0 | | -4(2-6x)=24x-8 | | 3x^3-9x^2-12x=0 | | 0=-x^4-7x^3+36x | | 6X^2+24-72=0 | | b^4+3b^2-4=0 | | 19-x=28-4x | | 32(-2-8)= | | X^2+mx-(m+1)=0 | | 9a+2b-8a-3b= | | x^3-x+14=0 | | 8sinx=secx |

Equations solver categories