3r+9=4r+5

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Solution for 3r+9=4r+5 equation:


Simplifying
3r + 9 = 4r + 5

Reorder the terms:
9 + 3r = 4r + 5

Reorder the terms:
9 + 3r = 5 + 4r

Solving
9 + 3r = 5 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
9 + 3r + -4r = 5 + 4r + -4r

Combine like terms: 3r + -4r = -1r
9 + -1r = 5 + 4r + -4r

Combine like terms: 4r + -4r = 0
9 + -1r = 5 + 0
9 + -1r = 5

Add '-9' to each side of the equation.
9 + -9 + -1r = 5 + -9

Combine like terms: 9 + -9 = 0
0 + -1r = 5 + -9
-1r = 5 + -9

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

Divide each side by '-1'.
r = 4

Simplifying
r = 4

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