R+21=4x+3

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Solution for R+21=4x+3 equation: 


Simplifying
R + 21 = 4x + 3

Reorder the terms:
21 + R = 4x + 3

Reorder the terms:
21 + R = 3 + 4x

Solving
21 + R = 3 + 4x

Solving for variable 'R'.

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

Add '-21' to each side of the equation.
21 + -21 + R = 3 + -21 + 4x

Combine like terms: 21 + -21 = 0
0 + R = 3 + -21 + 4x
R = 3 + -21 + 4x

Combine like terms: 3 + -21 = -18
R = -18 + 4x

Simplifying
R = -18 + 4x

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