91=10d+31

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Solution for 91=10d+31 equation:


Simplifying
91 = 10d + 31

Reorder the terms:
91 = 31 + 10d

Solving
91 = 31 + 10d

Solving for variable 'd'.

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

Add '-10d' to each side of the equation.
91 + -10d = 31 + 10d + -10d

Combine like terms: 10d + -10d = 0
91 + -10d = 31 + 0
91 + -10d = 31

Add '-91' to each side of the equation.
91 + -91 + -10d = 31 + -91

Combine like terms: 91 + -91 = 0
0 + -10d = 31 + -91
-10d = 31 + -91

Combine like terms: 31 + -91 = -60
-10d = -60

Divide each side by '-10'.
d = 6

Simplifying
d = 6

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