3x-7(-6)=21

Simple and best practice solution for 3x-7(-6)=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 3x-7(-6)=21 equation: 


Simplifying
3x + -7(-6) = 21

Multiply -7 * -6
3x + 42 = 21

Reorder the terms:
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:

| 8x^2-6x+3=0 | | 8x^2+27x-8=0 | | 12(2x-5)=4(6x+2) | | -50x+0.81=40x-0.48 | | 8+12t-2=9t+78-6t | | 7n-(-13n)= | | 9.2x=55.2 | | 3x+5x=34+10 | | 4*x+14=26 | | 2*x+8=18 | | 7*x+8x+30=45 | | 9d+4=2d-3 | | 3*x+5x=34+10 | | 3.6q-2.1-5.5q=-2.9q-2.5 | | 3.6q-2.1-5.5q=2.9q-2.5 | | 6m^2-11m+3=0 | | 2(z-4)=(z+1) | | 2x-4.2=-1.2 | | x^2+7x-132=0 | | 10(2*5)=(5*10)2 | | 2(3*4)=(2*3)4 | | 6(3*4)=(6*3)4 | | 2(4*6)=(2*4)6 | | 10(4*6)=(6*10)4 | | 3x^2-33x=-72 | | 2x^2+14x+14=0 | | x(9x+19)+10=0 | | x^6-10x^5-24x^4= | | 9+4+7=366392 | | 7x^2+70x=0 | | 4*36= | | -(6y+2)-(-5y-4)=2 |

Equations solver categories