3r+17=7+21x

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Solution for 3r+17=7+21x equation:


Simplifying
3r + 17 = 7 + 21x

Reorder the terms:
17 + 3r = 7 + 21x

Solving
17 + 3r = 7 + 21x

Solving for variable 'r'.

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

Add '-17' to each side of the equation.
17 + -17 + 3r = 7 + -17 + 21x

Combine like terms: 17 + -17 = 0
0 + 3r = 7 + -17 + 21x
3r = 7 + -17 + 21x

Combine like terms: 7 + -17 = -10
3r = -10 + 21x

Divide each side by '3'.
r = -3.333333333 + 7x

Simplifying
r = -3.333333333 + 7x

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