-0.8(2r+9)+2.5r=

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Solution for -0.8(2r+9)+2.5r= equation:


Simplifying
-0.8(2r + 9) + 2.5r = 0

Reorder the terms:
-0.8(9 + 2r) + 2.5r = 0
(9 * -0.8 + 2r * -0.8) + 2.5r = 0
(-7.2 + -1.6r) + 2.5r = 0

Combine like terms: -1.6r + 2.5r = 0.9r
-7.2 + 0.9r = 0

Solving
-7.2 + 0.9r = 0

Solving for variable 'r'.

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

Add '7.2' to each side of the equation.
-7.2 + 7.2 + 0.9r = 0 + 7.2

Combine like terms: -7.2 + 7.2 = 0.0
0.0 + 0.9r = 0 + 7.2
0.9r = 0 + 7.2

Combine like terms: 0 + 7.2 = 7.2
0.9r = 7.2

Divide each side by '0.9'.
r = 8

Simplifying
r = 8

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