8(3r+1)=21+(8r-5)

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Solution for 8(3r+1)=21+(8r-5) equation:


Simplifying
8(3r + 1) = 21 + (8r + -5)

Reorder the terms:
8(1 + 3r) = 21 + (8r + -5)
(1 * 8 + 3r * 8) = 21 + (8r + -5)
(8 + 24r) = 21 + (8r + -5)

Reorder the terms:
8 + 24r = 21 + (-5 + 8r)

Remove parenthesis around (-5 + 8r)
8 + 24r = 21 + -5 + 8r

Combine like terms: 21 + -5 = 16
8 + 24r = 16 + 8r

Solving
8 + 24r = 16 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
8 + 24r + -8r = 16 + 8r + -8r

Combine like terms: 24r + -8r = 16r
8 + 16r = 16 + 8r + -8r

Combine like terms: 8r + -8r = 0
8 + 16r = 16 + 0
8 + 16r = 16

Add '-8' to each side of the equation.
8 + -8 + 16r = 16 + -8

Combine like terms: 8 + -8 = 0
0 + 16r = 16 + -8
16r = 16 + -8

Combine like terms: 16 + -8 = 8
16r = 8

Divide each side by '16'.
r = 0.5

Simplifying
r = 0.5

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