91-d=42

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Solution for 91-d=42 equation:


Simplifying
91 + -1d = 42

Solving
91 + -1d = 42

Solving for variable 'd'.

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

Add '-91' to each side of the equation.
91 + -91 + -1d = 42 + -91

Combine like terms: 91 + -91 = 0
0 + -1d = 42 + -91
-1d = 42 + -91

Combine like terms: 42 + -91 = -49
-1d = -49

Divide each side by '-1'.
d = 49

Simplifying
d = 49

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