r+(r+5)=77

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Solution for r+(r+5)=77 equation:


Simplifying
r + (r + 5) = 77

Reorder the terms:
r + (5 + r) = 77

Remove parenthesis around (5 + r)
r + 5 + r = 77

Reorder the terms:
5 + r + r = 77

Combine like terms: r + r = 2r
5 + 2r = 77

Solving
5 + 2r = 77

Solving for variable 'r'.

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

Add '-5' to each side of the equation.
5 + -5 + 2r = 77 + -5

Combine like terms: 5 + -5 = 0
0 + 2r = 77 + -5
2r = 77 + -5

Combine like terms: 77 + -5 = 72
2r = 72

Divide each side by '2'.
r = 36

Simplifying
r = 36

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