4(2r-5)=-100

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Solution for 4(2r-5)=-100 equation: 


Simplifying
4(2r + -5) = -100

Reorder the terms:
4(-5 + 2r) = -100
(-5 * 4 + 2r * 4) = -100
(-20 + 8r) = -100

Solving
-20 + 8r = -100

Solving for variable 'r'.

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

Add '20' to each side of the equation.
-20 + 20 + 8r = -100 + 20

Combine like terms: -20 + 20 = 0
0 + 8r = -100 + 20
8r = -100 + 20

Combine like terms: -100 + 20 = -80
8r = -80

Divide each side by '8'.
r = -10

Simplifying
r = -10

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