78+r=-15

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Solution for 78+r=-15 equation: 


Simplifying
78 + r = -15

Solving
78 + r = -15

Solving for variable 'r'.

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

Add '-78' to each side of the equation.
78 + -78 + r = -15 + -78

Combine like terms: 78 + -78 = 0
0 + r = -15 + -78
r = -15 + -78

Combine like terms: -15 + -78 = -93
r = -93

Simplifying
r = -93

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