3(d+2)=21

Simple and best practice solution for 3(d+2)=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 3(d+2)=21 equation: 


Simplifying
3(d + 2) = 21

Reorder the terms:
3(2 + d) = 21
(2 * 3 + d * 3) = 21
(6 + 3d) = 21

Solving
6 + 3d = 21

Solving for variable 'd'.

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

Add '-6' to each side of the equation.
6 + -6 + 3d = 21 + -6

Combine like terms: 6 + -6 = 0
0 + 3d = 21 + -6
3d = 21 + -6

Combine like terms: 21 + -6 = 15
3d = 15

Divide each side by '3'.
d = 5

Simplifying
d = 5

See similar equations:

| 5x-9-3x=2(x-6) | | 60*x+120*y=6000 | | 4(2a+6)=10 | | 4s+27=115 | | x^3-2*x^2+0*x+5=0 | | 9-3/1/3=1 | | (50x+64y)+(-7x+35y)= | | x^3+2*x^2+2*x+1=0 | | 13.75*4.3= | | (q-3)*x*3=12 | | 49x^-(5/8)-8/7x^7/8=0 | | 7x=3x+3 | | x=35500+0.16x | | 7x(2x-5)=3x(2-5x) | | 12m^2-15mn= | | (e+2)*x*3=12 | | x+10+x-20=90 | | (x+7)(x-8)-(x-9)(x+10)=0 | | 3x-1-2x-3=2x-4-2 | | x=35500+0.18x | | x=35.500+0.18x | | 3x-1-2x-5=2x-4 | | 49x^(-5/8)-8/7x^7/8=0 | | 7x^2+84-53x=0 | | 2x-1=12x-54 | | 3(y+9)+4=y+11 | | 7x-4(2x-2)+7=-2(3x-3)+6.4 | | 12-6x^2=(2x+3)(5-3x) | | 26+x-12= | | 49x^(-5/8)-8/7x^7/8 | | Lemon=25-17 | | H+34=78 |

Equations solver categories