40+7d=131

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Solution for 40+7d=131 equation: 


Simplifying
40 + 7d = 131

Solving
40 + 7d = 131

Solving for variable 'd'.

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

Add '-40' to each side of the equation.
40 + -40 + 7d = 131 + -40

Combine like terms: 40 + -40 = 0
0 + 7d = 131 + -40
7d = 131 + -40

Combine like terms: 131 + -40 = 91
7d = 91

Divide each side by '7'.
d = 13

Simplifying
d = 13

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