5(1+8r)-2=-397

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Solution for 5(1+8r)-2=-397 equation:


Simplifying
5(1 + 8r) + -2 = -397
(1 * 5 + 8r * 5) + -2 = -397
(5 + 40r) + -2 = -397

Reorder the terms:
5 + -2 + 40r = -397

Combine like terms: 5 + -2 = 3
3 + 40r = -397

Solving
3 + 40r = -397

Solving for variable 'r'.

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

Add '-3' to each side of the equation.
3 + -3 + 40r = -397 + -3

Combine like terms: 3 + -3 = 0
0 + 40r = -397 + -3
40r = -397 + -3

Combine like terms: -397 + -3 = -400
40r = -400

Divide each side by '40'.
r = -10

Simplifying
r = -10

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