-8(5r-20)-12r=-17-20r-15

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Solution for -8(5r-20)-12r=-17-20r-15 equation:


Simplifying
-8(5r + -20) + -12r = -17 + -20r + -15

Reorder the terms:
-8(-20 + 5r) + -12r = -17 + -20r + -15
(-20 * -8 + 5r * -8) + -12r = -17 + -20r + -15
(160 + -40r) + -12r = -17 + -20r + -15

Combine like terms: -40r + -12r = -52r
160 + -52r = -17 + -20r + -15

Reorder the terms:
160 + -52r = -17 + -15 + -20r

Combine like terms: -17 + -15 = -32
160 + -52r = -32 + -20r

Solving
160 + -52r = -32 + -20r

Solving for variable 'r'.

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

Add '20r' to each side of the equation.
160 + -52r + 20r = -32 + -20r + 20r

Combine like terms: -52r + 20r = -32r
160 + -32r = -32 + -20r + 20r

Combine like terms: -20r + 20r = 0
160 + -32r = -32 + 0
160 + -32r = -32

Add '-160' to each side of the equation.
160 + -160 + -32r = -32 + -160

Combine like terms: 160 + -160 = 0
0 + -32r = -32 + -160
-32r = -32 + -160

Combine like terms: -32 + -160 = -192
-32r = -192

Divide each side by '-32'.
r = 6

Simplifying
r = 6

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