-2r=8r-5(3r-4)

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Solution for -2r=8r-5(3r-4) equation:


Simplifying
-2r = 8r + -5(3r + -4)

Reorder the terms:
-2r = 8r + -5(-4 + 3r)
-2r = 8r + (-4 * -5 + 3r * -5)
-2r = 8r + (20 + -15r)

Reorder the terms:
-2r = 20 + 8r + -15r

Combine like terms: 8r + -15r = -7r
-2r = 20 + -7r

Solving
-2r = 20 + -7r

Solving for variable 'r'.

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

Add '7r' to each side of the equation.
-2r + 7r = 20 + -7r + 7r

Combine like terms: -2r + 7r = 5r
5r = 20 + -7r + 7r

Combine like terms: -7r + 7r = 0
5r = 20 + 0
5r = 20

Divide each side by '5'.
r = 4

Simplifying
r = 4

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