9-(3r-1)=40

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Solution for 9-(3r-1)=40 equation:


Simplifying
9 + -1(3r + -1) = 40

Reorder the terms:
9 + -1(-1 + 3r) = 40
9 + (-1 * -1 + 3r * -1) = 40
9 + (1 + -3r) = 40

Combine like terms: 9 + 1 = 10
10 + -3r = 40

Solving
10 + -3r = 40

Solving for variable 'r'.

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

Add '-10' to each side of the equation.
10 + -10 + -3r = 40 + -10

Combine like terms: 10 + -10 = 0
0 + -3r = 40 + -10
-3r = 40 + -10

Combine like terms: 40 + -10 = 30
-3r = 30

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

Simplifying
r = -10

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