4=6(r-5)-20

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Solution for 4=6(r-5)-20 equation: 


Simplifying
4 = 6(r + -5) + -20

Reorder the terms:
4 = 6(-5 + r) + -20
4 = (-5 * 6 + r * 6) + -20
4 = (-30 + 6r) + -20

Reorder the terms:
4 = -30 + -20 + 6r

Combine like terms: -30 + -20 = -50
4 = -50 + 6r

Solving
4 = -50 + 6r

Solving for variable 'r'.

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

Add '-6r' to each side of the equation.
4 + -6r = -50 + 6r + -6r

Combine like terms: 6r + -6r = 0
4 + -6r = -50 + 0
4 + -6r = -50

Add '-4' to each side of the equation.
4 + -4 + -6r = -50 + -4

Combine like terms: 4 + -4 = 0
0 + -6r = -50 + -4
-6r = -50 + -4

Combine like terms: -50 + -4 = -54
-6r = -54

Divide each side by '-6'.
r = 9

Simplifying
r = 9

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