(3x+21)=(4x+9)

Simple and best practice solution for (3x+21)=(4x+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 (3x+21)=(4x+9) equation:


Simplifying
(3x + 21) = (4x + 9)

Reorder the terms:
(21 + 3x) = (4x + 9)

Remove parenthesis around (21 + 3x)
21 + 3x = (4x + 9)

Reorder the terms:
21 + 3x = (9 + 4x)

Remove parenthesis around (9 + 4x)
21 + 3x = 9 + 4x

Solving
21 + 3x = 9 + 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 + 3x + -4x = 9 + 4x + -4x

Combine like terms: 3x + -4x = -1x
21 + -1x = 9 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + -1x = 9 + 0
21 + -1x = 9

Add '-21' to each side of the equation.
21 + -21 + -1x = 9 + -21

Combine like terms: 21 + -21 = 0
0 + -1x = 9 + -21
-1x = 9 + -21

Combine like terms: 9 + -21 = -12
-1x = -12

Divide each side by '-1'.
x = 12

Simplifying
x = 12

See similar equations:

| -55=-b+5+11b | | x^2-0.8x=0 | | 3(3n+3)+1=6(9+n) | | 40x+4x^2=0 | | -7x-(-10-x)=-58 | | 4x(x+10)=0 | | 7x+(x+2)=29 | | 17a=41 | | 10+4/2*(5-1+3)= | | 3(2h-1)= | | 10+4/2*(-1+3)= | | 4(4)=r(-4) | | 14=56 | | 3(4)=r(-4) | | 8(x+y)-3(4x-4y)= | | 9r=72 | | 29=7+x(x+2) | | 36-8p=p | | 9x-10y=4 | | 5st+4=3s | | 45=2(x+9)+3 | | 4x^2-24x+40=0 | | -3x-2(6x-3y)= | | .4k=-40 | | b=56 | | -73=3(m-1)+4m | | i^64=0 | | 2(8-m)+(-m)=5m+9 | | -11x+8y=76 | | 6=8(.5)+2 | | 3x-4(4x-5y)= | | 10+4/2(-1+3)= |

Equations solver categories