3r+3=21

Simple and best practice solution for 3r+3=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 3r+3=21 equation: 


Simplifying
3r + 3 = 21

Reorder the terms:
3 + 3r = 21

Solving
3 + 3r = 21

Solving for variable 'r'.

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

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

Combine like terms: 3 + -3 = 0
0 + 3r = 21 + -3
3r = 21 + -3

Combine like terms: 21 + -3 = 18
3r = 18

Divide each side by '3'.
r = 6

Simplifying
r = 6

See similar equations:

| 3(6w+8)=-30 | | 65=3x+6x+2 | | 2+5x+y=0 | | 7x+1=2x+4 | | -4x-20=6x | | 2x+46=4x+14 | | 4z+9=21 | | -1/2y=-8 | | 0.4x-0.5=0.3x+6 | | 6p-9=3 | | 2x^2-5x+6.25=0 | | 6n+128=16-n | | 116-33/6-5(116)-34/7 | | -6x-8-7x=96 | | 5(q+3)+2(2q-5)=23 | | -1.4+Y/5=-13.9 | | .06p-3.2=.4 | | -8(5x+7)+8= | | (7/3x-7/2x)+1=(x-16/3x)+16/5x | | 10x-7x=5 | | 6.3x-5.5=2.3x-1.5 | | a/x-b=c | | 3(3p+3)+3p=-3 | | x^4-20x=-64 | | W/5=W/3+4 | | n+(-19)=-23 | | 4U+6/5=5U-3/2+1 | | 15t^2-22t-5= | | (2)(3)(-4)=12c | | 6.7x+5=5.7x | | 9x-2=(-4) | | V-7/2=-4/3V-7/4 |

Equations solver categories