8-4r=47+9r

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Solution for 8-4r=47+9r equation:


Simplifying
8 + -4r = 47 + 9r

Solving
8 + -4r = 47 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
8 + -4r + -9r = 47 + 9r + -9r

Combine like terms: -4r + -9r = -13r
8 + -13r = 47 + 9r + -9r

Combine like terms: 9r + -9r = 0
8 + -13r = 47 + 0
8 + -13r = 47

Add '-8' to each side of the equation.
8 + -8 + -13r = 47 + -8

Combine like terms: 8 + -8 = 0
0 + -13r = 47 + -8
-13r = 47 + -8

Combine like terms: 47 + -8 = 39
-13r = 39

Divide each side by '-13'.
r = -3

Simplifying
r = -3

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