3r+4=13r+9

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Solution for 3r+4=13r+9 equation:


Simplifying
3r + 4 = 13r + 9

Reorder the terms:
4 + 3r = 13r + 9

Reorder the terms:
4 + 3r = 9 + 13r

Solving
4 + 3r = 9 + 13r

Solving for variable 'r'.

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

Add '-13r' to each side of the equation.
4 + 3r + -13r = 9 + 13r + -13r

Combine like terms: 3r + -13r = -10r
4 + -10r = 9 + 13r + -13r

Combine like terms: 13r + -13r = 0
4 + -10r = 9 + 0
4 + -10r = 9

Add '-4' to each side of the equation.
4 + -4 + -10r = 9 + -4

Combine like terms: 4 + -4 = 0
0 + -10r = 9 + -4
-10r = 9 + -4

Combine like terms: 9 + -4 = 5
-10r = 5

Divide each side by '-10'.
r = -0.5

Simplifying
r = -0.5

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