2r+(20-r)-3=30

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Solution for 2r+(20-r)-3=30 equation:


Simplifying
2r + (20 + -1r) + -3 = 30

Remove parenthesis around (20 + -1r)
2r + 20 + -1r + -3 = 30

Reorder the terms:
20 + -3 + 2r + -1r = 30

Combine like terms: 20 + -3 = 17
17 + 2r + -1r = 30

Combine like terms: 2r + -1r = 1r
17 + 1r = 30

Solving
17 + 1r = 30

Solving for variable 'r'.

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

Add '-17' to each side of the equation.
17 + -17 + 1r = 30 + -17

Combine like terms: 17 + -17 = 0
0 + 1r = 30 + -17
1r = 30 + -17

Combine like terms: 30 + -17 = 13
1r = 13

Divide each side by '1'.
r = 13

Simplifying
r = 13

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