-5-5(6+4r)=-4r-21

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Solution for -5-5(6+4r)=-4r-21 equation: 


Simplifying
-5 + -5(6 + 4r) = -4r + -21
-5 + (6 * -5 + 4r * -5) = -4r + -21
-5 + (-30 + -20r) = -4r + -21

Combine like terms: -5 + -30 = -35
-35 + -20r = -4r + -21

Reorder the terms:
-35 + -20r = -21 + -4r

Solving
-35 + -20r = -21 + -4r

Solving for variable 'r'.

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

Add '4r' to each side of the equation.
-35 + -20r + 4r = -21 + -4r + 4r

Combine like terms: -20r + 4r = -16r
-35 + -16r = -21 + -4r + 4r

Combine like terms: -4r + 4r = 0
-35 + -16r = -21 + 0
-35 + -16r = -21

Add '35' to each side of the equation.
-35 + 35 + -16r = -21 + 35

Combine like terms: -35 + 35 = 0
0 + -16r = -21 + 35
-16r = -21 + 35

Combine like terms: -21 + 35 = 14
-16r = 14

Divide each side by '-16'.
r = -0.875

Simplifying
r = -0.875

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