r+9=-8(2r+1)

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Solution for r+9=-8(2r+1) equation:


Simplifying
r + 9 = -8(2r + 1)

Reorder the terms:
9 + r = -8(2r + 1)

Reorder the terms:
9 + r = -8(1 + 2r)
9 + r = (1 * -8 + 2r * -8)
9 + r = (-8 + -16r)

Solving
9 + r = -8 + -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.
9 + r + 16r = -8 + -16r + 16r

Combine like terms: r + 16r = 17r
9 + 17r = -8 + -16r + 16r

Combine like terms: -16r + 16r = 0
9 + 17r = -8 + 0
9 + 17r = -8

Add '-9' to each side of the equation.
9 + -9 + 17r = -8 + -9

Combine like terms: 9 + -9 = 0
0 + 17r = -8 + -9
17r = -8 + -9

Combine like terms: -8 + -9 = -17
17r = -17

Divide each side by '17'.
r = -1

Simplifying
r = -1

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