3(d-7)=9

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Solution for 3(d-7)=9 equation: 


Simplifying
3(d + -7) = 9

Reorder the terms:
3(-7 + d) = 9
(-7 * 3 + d * 3) = 9
(-21 + 3d) = 9

Solving
-21 + 3d = 9

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 = 9 + 21

Combine like terms: -21 + 21 = 0
0 + 3d = 9 + 21
3d = 9 + 21

Combine like terms: 9 + 21 = 30
3d = 30

Divide each side by '3'.
d = 10

Simplifying
d = 10

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