91-c=4

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Solution for 91-c=4 equation:


Simplifying
91 + -1c = 4

Solving
91 + -1c = 4

Solving for variable 'c'.

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

Add '-91' to each side of the equation.
91 + -91 + -1c = 4 + -91

Combine like terms: 91 + -91 = 0
0 + -1c = 4 + -91
-1c = 4 + -91

Combine like terms: 4 + -91 = -87
-1c = -87

Divide each side by '-1'.
c = 87

Simplifying
c = 87

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