7x-21=4(x-9)

Simple and best practice solution for 7x-21=4(x-9) 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 7x-21=4(x-9) equation:


Simplifying
7x + -21 = 4(x + -9)

Reorder the terms:
-21 + 7x = 4(x + -9)

Reorder the terms:
-21 + 7x = 4(-9 + x)
-21 + 7x = (-9 * 4 + x * 4)
-21 + 7x = (-36 + 4x)

Solving
-21 + 7x = -36 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-21 + 7x + -4x = -36 + 4x + -4x

Combine like terms: 7x + -4x = 3x
-21 + 3x = -36 + 4x + -4x

Combine like terms: 4x + -4x = 0
-21 + 3x = -36 + 0
-21 + 3x = -36

Add '21' to each side of the equation.
-21 + 21 + 3x = -36 + 21

Combine like terms: -21 + 21 = 0
0 + 3x = -36 + 21
3x = -36 + 21

Combine like terms: -36 + 21 = -15
3x = -15

Divide each side by '3'.
x = -5

Simplifying
x = -5

See similar equations:

| w^2+14w+49=8 | | 34+p+112=71 | | 34+p+112=78 | | (20b*c)/(28c*d) | | 9x+8y=16 | | 2x/4=3/4 | | 3/-62 | | x+29=18 | | -8-5=64+3n | | 12=-4(3x+3)+13x | | y=15x+495 | | 122/45/9 | | (6-23)-(-4)/(-4) | | 8v=3v^2-3 | | 2y+2(y-6)=7y-5y(y-10) | | x^3-6x^2-36=0 | | -215+e+-43=-145 | | (7x^2)(9x^3)= | | 12y^2-75=0 | | 5-3x=-6x+8 | | 30-2x=2x | | 0.5(x+1)+0.25=0.6x-0.16+0.75 | | 24=2b^2+2b | | 1/8x+6=-5 | | 4(w+7)=2w+22 | | 6x^2-5x+3k=0 | | 19u=4u^2-5 | | m-14=19 | | D=3/2(m-33) | | 1/x+2+36/x+3=19 | | 4x^2-9y^2-32=0 | | 12=b^2+b |

Equations solver categories