4r+9=8+-13

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Solution for 4r+9=8+-13 equation:


Simplifying
4r + 9 = 8 + -13

Reorder the terms:
9 + 4r = 8 + -13

Combine like terms: 8 + -13 = -5
9 + 4r = -5

Solving
9 + 4r = -5

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + 4r = -5 + -9

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

Combine like terms: -5 + -9 = -14
4r = -14

Divide each side by '4'.
r = -3.5

Simplifying
r = -3.5

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