4R-18=20

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Solution for 4R-18=20 equation: 


Simplifying
4R + -18 = 20

Reorder the terms:
-18 + 4R = 20

Solving
-18 + 4R = 20

Solving for variable 'R'.

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

Add '18' to each side of the equation.
-18 + 18 + 4R = 20 + 18

Combine like terms: -18 + 18 = 0
0 + 4R = 20 + 18
4R = 20 + 18

Combine like terms: 20 + 18 = 38
4R = 38

Divide each side by '4'.
R = 9.5

Simplifying
R = 9.5

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