2(R-1)=42

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Solution for 2(R-1)=42 equation: 


Simplifying
2(R + -1) = 42

Reorder the terms:
2(-1 + R) = 42
(-1 * 2 + R * 2) = 42
(-2 + 2R) = 42

Solving
-2 + 2R = 42

Solving for variable 'R'.

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

Add '2' to each side of the equation.
-2 + 2 + 2R = 42 + 2

Combine like terms: -2 + 2 = 0
0 + 2R = 42 + 2
2R = 42 + 2

Combine like terms: 42 + 2 = 44
2R = 44

Divide each side by '2'.
R = 22

Simplifying
R = 22

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