4(-3-5r)=-172

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Solution for 4(-3-5r)=-172 equation: 


Simplifying
4(-3 + -5r) = -172
(-3 * 4 + -5r * 4) = -172
(-12 + -20r) = -172

Solving
-12 + -20r = -172

Solving for variable 'r'.

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

Add '12' to each side of the equation.
-12 + 12 + -20r = -172 + 12

Combine like terms: -12 + 12 = 0
0 + -20r = -172 + 12
-20r = -172 + 12

Combine like terms: -172 + 12 = -160
-20r = -160

Divide each side by '-20'.
r = 8

Simplifying
r = 8

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