3(2r-4)+20-6r=3r-4

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Solution for 3(2r-4)+20-6r=3r-4 equation:


Simplifying
3(2r + -4) + 20 + -6r = 3r + -4

Reorder the terms:
3(-4 + 2r) + 20 + -6r = 3r + -4
(-4 * 3 + 2r * 3) + 20 + -6r = 3r + -4
(-12 + 6r) + 20 + -6r = 3r + -4

Reorder the terms:
-12 + 20 + 6r + -6r = 3r + -4

Combine like terms: -12 + 20 = 8
8 + 6r + -6r = 3r + -4

Combine like terms: 6r + -6r = 0
8 + 0 = 3r + -4
8 = 3r + -4

Reorder the terms:
8 = -4 + 3r

Solving
8 = -4 + 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.
8 + -3r = -4 + 3r + -3r

Combine like terms: 3r + -3r = 0
8 + -3r = -4 + 0
8 + -3r = -4

Add '-8' to each side of the equation.
8 + -8 + -3r = -4 + -8

Combine like terms: 8 + -8 = 0
0 + -3r = -4 + -8
-3r = -4 + -8

Combine like terms: -4 + -8 = -12
-3r = -12

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

Simplifying
r = 4

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