2r-43=21

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Solution for 2r-43=21 equation: 


Simplifying
2r + -43 = 21

Reorder the terms:
-43 + 2r = 21

Solving
-43 + 2r = 21

Solving for variable 'r'.

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

Add '43' to each side of the equation.
-43 + 43 + 2r = 21 + 43

Combine like terms: -43 + 43 = 0
0 + 2r = 21 + 43
2r = 21 + 43

Combine like terms: 21 + 43 = 64
2r = 64

Divide each side by '2'.
r = 32

Simplifying
r = 32

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