10.9+2.8r+8(10.9r-1)=

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Solution for 10.9+2.8r+8(10.9r-1)= equation:


Simplifying
10.9 + 2.8r + 8(10.9r + -1) = 0

Reorder the terms:
10.9 + 2.8r + 8(-1 + 10.9r) = 0
10.9 + 2.8r + (-1 * 8 + 10.9r * 8) = 0
10.9 + 2.8r + (-8 + 87.2r) = 0

Reorder the terms:
10.9 + -8 + 2.8r + 87.2r = 0

Combine like terms: 10.9 + -8 = 2.9
2.9 + 2.8r + 87.2r = 0

Combine like terms: 2.8r + 87.2r = 90r
2.9 + 90r = 0

Solving
2.9 + 90r = 0

Solving for variable 'r'.

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

Add '-2.9' to each side of the equation.
2.9 + -2.9 + 90r = 0 + -2.9

Combine like terms: 2.9 + -2.9 = 0.0
0.0 + 90r = 0 + -2.9
90r = 0 + -2.9

Combine like terms: 0 + -2.9 = -2.9
90r = -2.9

Divide each side by '90'.
r = -0.03222222222

Simplifying
r = -0.03222222222

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