-21+5r=8(2r+6)

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Solution for -21+5r=8(2r+6) equation:


Simplifying
-21 + 5r = 8(2r + 6)

Reorder the terms:
-21 + 5r = 8(6 + 2r)
-21 + 5r = (6 * 8 + 2r * 8)
-21 + 5r = (48 + 16r)

Solving
-21 + 5r = 48 + 16r

Solving for variable 'r'.

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

Add '-16r' to each side of the equation.
-21 + 5r + -16r = 48 + 16r + -16r

Combine like terms: 5r + -16r = -11r
-21 + -11r = 48 + 16r + -16r

Combine like terms: 16r + -16r = 0
-21 + -11r = 48 + 0
-21 + -11r = 48

Add '21' to each side of the equation.
-21 + 21 + -11r = 48 + 21

Combine like terms: -21 + 21 = 0
0 + -11r = 48 + 21
-11r = 48 + 21

Combine like terms: 48 + 21 = 69
-11r = 69

Divide each side by '-11'.
r = -6.272727273

Simplifying
r = -6.272727273

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