40=-8r+24

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Solution for 40=-8r+24 equation:


Simplifying
40 = -8r + 24

Reorder the terms:
40 = 24 + -8r

Solving
40 = 24 + -8r

Solving for variable 'r'.

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

Add '8r' to each side of the equation.
40 + 8r = 24 + -8r + 8r

Combine like terms: -8r + 8r = 0
40 + 8r = 24 + 0
40 + 8r = 24

Add '-40' to each side of the equation.
40 + -40 + 8r = 24 + -40

Combine like terms: 40 + -40 = 0
0 + 8r = 24 + -40
8r = 24 + -40

Combine like terms: 24 + -40 = -16
8r = -16

Divide each side by '8'.
r = -2

Simplifying
r = -2

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