6+3(r-2)=21

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Solution for 6+3(r-2)=21 equation: 


Simplifying
6 + 3(r + -2) = 21

Reorder the terms:
6 + 3(-2 + r) = 21
6 + (-2 * 3 + r * 3) = 21
6 + (-6 + 3r) = 21

Combine like terms: 6 + -6 = 0
0 + 3r = 21
3r = 21

Solving
3r = 21

Solving for variable 'r'.

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

Divide each side by '3'.
r = 7

Simplifying
r = 7

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