9-4(2r-1)=2r-5+r

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Solution for 9-4(2r-1)=2r-5+r equation:


Simplifying
9 + -4(2r + -1) = 2r + -5 + r

Reorder the terms:
9 + -4(-1 + 2r) = 2r + -5 + r
9 + (-1 * -4 + 2r * -4) = 2r + -5 + r
9 + (4 + -8r) = 2r + -5 + r

Combine like terms: 9 + 4 = 13
13 + -8r = 2r + -5 + r

Reorder the terms:
13 + -8r = -5 + 2r + r

Combine like terms: 2r + r = 3r
13 + -8r = -5 + 3r

Solving
13 + -8r = -5 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
13 + -8r + -3r = -5 + 3r + -3r

Combine like terms: -8r + -3r = -11r
13 + -11r = -5 + 3r + -3r

Combine like terms: 3r + -3r = 0
13 + -11r = -5 + 0
13 + -11r = -5

Add '-13' to each side of the equation.
13 + -13 + -11r = -5 + -13

Combine like terms: 13 + -13 = 0
0 + -11r = -5 + -13
-11r = -5 + -13

Combine like terms: -5 + -13 = -18
-11r = -18

Divide each side by '-11'.
r = 1.636363636

Simplifying
r = 1.636363636

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