2(r-3)+4=4(2r+5)

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Solution for 2(r-3)+4=4(2r+5) equation:


Simplifying
2(r + -3) + 4 = 4(2r + 5)

Reorder the terms:
2(-3 + r) + 4 = 4(2r + 5)
(-3 * 2 + r * 2) + 4 = 4(2r + 5)
(-6 + 2r) + 4 = 4(2r + 5)

Reorder the terms:
-6 + 4 + 2r = 4(2r + 5)

Combine like terms: -6 + 4 = -2
-2 + 2r = 4(2r + 5)

Reorder the terms:
-2 + 2r = 4(5 + 2r)
-2 + 2r = (5 * 4 + 2r * 4)
-2 + 2r = (20 + 8r)

Solving
-2 + 2r = 20 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
-2 + 2r + -8r = 20 + 8r + -8r

Combine like terms: 2r + -8r = -6r
-2 + -6r = 20 + 8r + -8r

Combine like terms: 8r + -8r = 0
-2 + -6r = 20 + 0
-2 + -6r = 20

Add '2' to each side of the equation.
-2 + 2 + -6r = 20 + 2

Combine like terms: -2 + 2 = 0
0 + -6r = 20 + 2
-6r = 20 + 2

Combine like terms: 20 + 2 = 22
-6r = 22

Divide each side by '-6'.
r = -3.666666667

Simplifying
r = -3.666666667

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