5(r+5)=8(r+9)

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Solution for 5(r+5)=8(r+9) equation:


Simplifying
5(r + 5) = 8(r + 9)

Reorder the terms:
5(5 + r) = 8(r + 9)
(5 * 5 + r * 5) = 8(r + 9)
(25 + 5r) = 8(r + 9)

Reorder the terms:
25 + 5r = 8(9 + r)
25 + 5r = (9 * 8 + r * 8)
25 + 5r = (72 + 8r)

Solving
25 + 5r = 72 + 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.
25 + 5r + -8r = 72 + 8r + -8r

Combine like terms: 5r + -8r = -3r
25 + -3r = 72 + 8r + -8r

Combine like terms: 8r + -8r = 0
25 + -3r = 72 + 0
25 + -3r = 72

Add '-25' to each side of the equation.
25 + -25 + -3r = 72 + -25

Combine like terms: 25 + -25 = 0
0 + -3r = 72 + -25
-3r = 72 + -25

Combine like terms: 72 + -25 = 47
-3r = 47

Divide each side by '-3'.
r = -15.66666667

Simplifying
r = -15.66666667

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