6d+d-9=40

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Solution for 6d+d-9=40 equation:


Simplifying
6d + d + -9 = 40

Reorder the terms:
-9 + 6d + d = 40

Combine like terms: 6d + d = 7d
-9 + 7d = 40

Solving
-9 + 7d = 40

Solving for variable 'd'.

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

Add '9' to each side of the equation.
-9 + 9 + 7d = 40 + 9

Combine like terms: -9 + 9 = 0
0 + 7d = 40 + 9
7d = 40 + 9

Combine like terms: 40 + 9 = 49
7d = 49

Divide each side by '7'.
d = 7

Simplifying
d = 7

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