42-3x=21

Simple and best practice solution for 42-3x=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 42-3x=21 equation: 


Simplifying
42 + -3x = 21

Solving
42 + -3x = 21

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + -3x = 21 + -42

Combine like terms: 42 + -42 = 0
0 + -3x = 21 + -42
-3x = 21 + -42

Combine like terms: 21 + -42 = -21
-3x = -21

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

Simplifying
x = 7

See similar equations:

| 2(x-6)+3x=2(x-5) | | X^2=-28 | | 8x-2=6x-34 | | 11x-10=5y+6x | | -5n+8=-8 | | 9(2x+10)=24x | | 2(x+1)=6(x-2)+2 | | -2x+6=-x | | 7g^2+33g=10 | | p+5=5051583 | | 6-5=31-n | | 6-5=31- | | 6-5=32-n | | 2(2x-2)-5=2(x-4)+7 | | z^2+14z+48=0 | | 6-5=n-32 | | 6-5= | | 5m(0)+6= | | 4x^3=8X^2+5X | | 83+434= | | m(m-3)-2m(m-4)=-(m^2-4m)+6 | | 7=(5+a)/4 | | v-2+5=1 | | 434-517= | | .71-.22s=1.04-0.62s | | 5x^2-2x=16 | | x+2+x+x+3=35 | | z-3/1=10 | | p=35 | | 3x=4x-6 | | 8-12y+12y=8 | | 517-83=x |

Equations solver categories