-3d-(-21)=6

Simple and best practice solution for -3d-(-21)=6 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 -3d-(-21)=6 equation: 


Simplifying
-3d + -1(-21) = 6

Multiply -1 * -21
-3d + 21 = 6

Reorder the terms:
21 + -3d = 6

Solving
21 + -3d = 6

Solving for variable 'd'.

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

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

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

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

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

Simplifying
d = 5

See similar equations:

| (7x-2)=(3x+12) | | 2m+6=8m | | .06(y-6)+.18=.20y-.07(10) | | -10-3x=-4+4 | | -14+7=m-5 | | x^2-3y^2+6y-15=0 | | x-3=2+8 | | 18x=1x | | 5-2x(-6y)= | | -4x-6=-6x+8 | | 4x+16-3x=-5-12 | | 0=(6x+5)(5x+5) | | F(x+9)=8x+7 | | 23x+8-25x=6-8 | | 13y+20x+3y=180 | | -9m-13=-103 | | 6x+16-5x=3-10 | | (6x-11)+(2x-9)=90 | | x-8+(-8x)-15=-7x-23 | | 2-2=8x+4x | | 20y+19=180 | | 20y+18=90 | | 2l+2(40)=550 | | 35=6t-11t | | 3x^2-15x+48=0 | | 4-6x+2(x-9)=9+2x-17 | | 6t=30t+120 | | 0.20(y-7)+0.16y=0.12y-0.01(50) | | 512*24= | | C(x)=0.1x^2-1.1x+5.249 | | m+5n=4 | | 12w-15w=-24 |

Equations solver categories