7(r+6)=5(r+8)

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Solution for 7(r+6)=5(r+8) equation:


Simplifying
7(r + 6) = 5(r + 8)

Reorder the terms:
7(6 + r) = 5(r + 8)
(6 * 7 + r * 7) = 5(r + 8)
(42 + 7r) = 5(r + 8)

Reorder the terms:
42 + 7r = 5(8 + r)
42 + 7r = (8 * 5 + r * 5)
42 + 7r = (40 + 5r)

Solving
42 + 7r = 40 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
42 + 7r + -5r = 40 + 5r + -5r

Combine like terms: 7r + -5r = 2r
42 + 2r = 40 + 5r + -5r

Combine like terms: 5r + -5r = 0
42 + 2r = 40 + 0
42 + 2r = 40

Add '-42' to each side of the equation.
42 + -42 + 2r = 40 + -42

Combine like terms: 42 + -42 = 0
0 + 2r = 40 + -42
2r = 40 + -42

Combine like terms: 40 + -42 = -2
2r = -2

Divide each side by '2'.
r = -1

Simplifying
r = -1

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