12+5(r-5)+3r=

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Solution for 12+5(r-5)+3r= equation:


Simplifying
12 + 5(r + -5) + 3r = 0

Reorder the terms:
12 + 5(-5 + r) + 3r = 0
12 + (-5 * 5 + r * 5) + 3r = 0
12 + (-25 + 5r) + 3r = 0

Combine like terms: 12 + -25 = -13
-13 + 5r + 3r = 0

Combine like terms: 5r + 3r = 8r
-13 + 8r = 0

Solving
-13 + 8r = 0

Solving for variable 'r'.

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

Add '13' to each side of the equation.
-13 + 13 + 8r = 0 + 13

Combine like terms: -13 + 13 = 0
0 + 8r = 0 + 13
8r = 0 + 13

Combine like terms: 0 + 13 = 13
8r = 13

Divide each side by '8'.
r = 1.625

Simplifying
r = 1.625

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