9r-4r-4r-1=17

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Solution for 9r-4r-4r-1=17 equation:


Simplifying
9r + -4r + -4r + -1 = 17

Reorder the terms:
-1 + 9r + -4r + -4r = 17

Combine like terms: 9r + -4r = 5r
-1 + 5r + -4r = 17

Combine like terms: 5r + -4r = 1r
-1 + 1r = 17

Solving
-1 + 1r = 17

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + 1 + 1r = 17 + 1

Combine like terms: -1 + 1 = 0
0 + 1r = 17 + 1
1r = 17 + 1

Combine like terms: 17 + 1 = 18
1r = 18

Divide each side by '1'.
r = 18

Simplifying
r = 18

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