3(2r+4)=42

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Solution for 3(2r+4)=42 equation:


Simplifying
3(2r + 4) = 42

Reorder the terms:
3(4 + 2r) = 42
(4 * 3 + 2r * 3) = 42
(12 + 6r) = 42

Solving
12 + 6r = 42

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + 6r = 42 + -12

Combine like terms: 12 + -12 = 0
0 + 6r = 42 + -12
6r = 42 + -12

Combine like terms: 42 + -12 = 30
6r = 30

Divide each side by '6'.
r = 5

Simplifying
r = 5

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