85=16-15+r+18

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Solution for 85=16-15+r+18 equation:


Simplifying
85 = 16 + -15 + r + 18

Reorder the terms:
85 = 16 + -15 + 18 + r

Combine like terms: 16 + -15 = 1
85 = 1 + 18 + r

Combine like terms: 1 + 18 = 19
85 = 19 + r

Solving
85 = 19 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
85 + -1r = 19 + r + -1r

Combine like terms: r + -1r = 0
85 + -1r = 19 + 0
85 + -1r = 19

Add '-85' to each side of the equation.
85 + -85 + -1r = 19 + -85

Combine like terms: 85 + -85 = 0
0 + -1r = 19 + -85
-1r = 19 + -85

Combine like terms: 19 + -85 = -66
-1r = -66

Divide each side by '-1'.
r = 66

Simplifying
r = 66

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