9+r=2r+4

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Solution for 9+r=2r+4 equation:


Simplifying
9 + r = 2r + 4

Reorder the terms:
9 + r = 4 + 2r

Solving
9 + r = 4 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
9 + r + -2r = 4 + 2r + -2r

Combine like terms: r + -2r = -1r
9 + -1r = 4 + 2r + -2r

Combine like terms: 2r + -2r = 0
9 + -1r = 4 + 0
9 + -1r = 4

Add '-9' to each side of the equation.
9 + -9 + -1r = 4 + -9

Combine like terms: 9 + -9 = 0
0 + -1r = 4 + -9
-1r = 4 + -9

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

Divide each side by '-1'.
r = 5

Simplifying
r = 5

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