5r-4r=4r-8r+15

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Solution for 5r-4r=4r-8r+15 equation:


Simplifying
5r + -4r = 4r + -8r + 15

Combine like terms: 5r + -4r = 1r
1r = 4r + -8r + 15

Reorder the terms:
1r = 15 + 4r + -8r

Combine like terms: 4r + -8r = -4r
1r = 15 + -4r

Solving
1r = 15 + -4r

Solving for variable 'r'.

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

Add '4r' to each side of the equation.
1r + 4r = 15 + -4r + 4r

Combine like terms: 1r + 4r = 5r
5r = 15 + -4r + 4r

Combine like terms: -4r + 4r = 0
5r = 15 + 0
5r = 15

Divide each side by '5'.
r = 3

Simplifying
r = 3

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