-3(r-7)=-9

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Solution for -3(r-7)=-9 equation:


Simplifying
-3(r + -7) = -9

Reorder the terms:
-3(-7 + r) = -9
(-7 * -3 + r * -3) = -9
(21 + -3r) = -9

Solving
21 + -3r = -9

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 + -3r = -9 + -21

Combine like terms: 21 + -21 = 0
0 + -3r = -9 + -21
-3r = -9 + -21

Combine like terms: -9 + -21 = -30
-3r = -30

Divide each side by '-3'.
r = 10

Simplifying
r = 10

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