3x+21=7x-1

Simple and best practice solution for 3x+21=7x-1 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+21=7x-1 equation:


Simplifying
3x + 21 = 7x + -1

Reorder the terms:
21 + 3x = 7x + -1

Reorder the terms:
21 + 3x = -1 + 7x

Solving
21 + 3x = -1 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
21 + 3x + -7x = -1 + 7x + -7x

Combine like terms: 3x + -7x = -4x
21 + -4x = -1 + 7x + -7x

Combine like terms: 7x + -7x = 0
21 + -4x = -1 + 0
21 + -4x = -1

Add '-21' to each side of the equation.
21 + -21 + -4x = -1 + -21

Combine like terms: 21 + -21 = 0
0 + -4x = -1 + -21
-4x = -1 + -21

Combine like terms: -1 + -21 = -22
-4x = -22

Divide each side by '-4'.
x = 5.5

Simplifying
x = 5.5

See similar equations:

| 8=x/4-4 | | 1/3x=-21 | | 4x-(5-10x)= | | -3-2(2)=7 | | 2u-3=-15 | | 3/2-1/4y=1/2 | | 3c+2-2c-5=2-0.67c | | 3(4x+1)-5x= | | 12.99+1.75=35 | | 2log(-5.8x+1.5)+x+1=0 | | 6x=-8(x-7) | | -3x=4x+7(5+4x) | | 2z^2+6z-8=0 | | 0=-3(0)+2 | | 7r+7+8=-20 | | 5x+9y=10000 | | 3(w-3)-8w=16 | | N/5=65 | | 13=14g | | x=13-24 | | 24-5x=14 | | 5+3(2y-7)= | | 6m+8=36 | | 22+8n=6(6n-1) | | 3x-5-5x+7= | | 4+3p-p=-10-5p | | 20x^5y^2-16x^2y-4x/4xy | | 17x+49+8x=3+x | | -6=n*2-10 | | 1.5y+7=2 | | 4-2x=-(X-1) | | G-2/2=-46 |

Equations solver categories