(r-4)=2(r-8)+3r

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Solution for (r-4)=2(r-8)+3r equation:


Simplifying
(r + -4) = 2(r + -8) + 3r

Reorder the terms:
(-4 + r) = 2(r + -8) + 3r

Remove parenthesis around (-4 + r)
-4 + r = 2(r + -8) + 3r

Reorder the terms:
-4 + r = 2(-8 + r) + 3r
-4 + r = (-8 * 2 + r * 2) + 3r
-4 + r = (-16 + 2r) + 3r

Combine like terms: 2r + 3r = 5r
-4 + r = -16 + 5r

Solving
-4 + r = -16 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
-4 + r + -5r = -16 + 5r + -5r

Combine like terms: r + -5r = -4r
-4 + -4r = -16 + 5r + -5r

Combine like terms: 5r + -5r = 0
-4 + -4r = -16 + 0
-4 + -4r = -16

Add '4' to each side of the equation.
-4 + 4 + -4r = -16 + 4

Combine like terms: -4 + 4 = 0
0 + -4r = -16 + 4
-4r = -16 + 4

Combine like terms: -16 + 4 = -12
-4r = -12

Divide each side by '-4'.
r = 3

Simplifying
r = 3

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