r+4r-9=4r-5

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Solution for r+4r-9=4r-5 equation:


Simplifying
r + 4r + -9 = 4r + -5

Reorder the terms:
-9 + r + 4r = 4r + -5

Combine like terms: r + 4r = 5r
-9 + 5r = 4r + -5

Reorder the terms:
-9 + 5r = -5 + 4r

Solving
-9 + 5r = -5 + 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.
-9 + 5r + -4r = -5 + 4r + -4r

Combine like terms: 5r + -4r = 1r
-9 + 1r = -5 + 4r + -4r

Combine like terms: 4r + -4r = 0
-9 + 1r = -5 + 0
-9 + 1r = -5

Add '9' to each side of the equation.
-9 + 9 + 1r = -5 + 9

Combine like terms: -9 + 9 = 0
0 + 1r = -5 + 9
1r = -5 + 9

Combine like terms: -5 + 9 = 4
1r = 4

Divide each side by '1'.
r = 4

Simplifying
r = 4

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