3r+9+8-7r=

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Solution for 3r+9+8-7r= equation:


Simplifying
3r + 9 + 8 + -7r = 0

Reorder the terms:
9 + 8 + 3r + -7r = 0

Combine like terms: 9 + 8 = 17
17 + 3r + -7r = 0

Combine like terms: 3r + -7r = -4r
17 + -4r = 0

Solving
17 + -4r = 0

Solving for variable 'r'.

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

Add '-17' to each side of the equation.
17 + -17 + -4r = 0 + -17

Combine like terms: 17 + -17 = 0
0 + -4r = 0 + -17
-4r = 0 + -17

Combine like terms: 0 + -17 = -17
-4r = -17

Divide each side by '-4'.
r = 4.25

Simplifying
r = 4.25

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