7+3r+9=-2r+31

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Solution for 7+3r+9=-2r+31 equation:


Simplifying
7 + 3r + 9 = -2r + 31

Reorder the terms:
7 + 9 + 3r = -2r + 31

Combine like terms: 7 + 9 = 16
16 + 3r = -2r + 31

Reorder the terms:
16 + 3r = 31 + -2r

Solving
16 + 3r = 31 + -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.
16 + 3r + 2r = 31 + -2r + 2r

Combine like terms: 3r + 2r = 5r
16 + 5r = 31 + -2r + 2r

Combine like terms: -2r + 2r = 0
16 + 5r = 31 + 0
16 + 5r = 31

Add '-16' to each side of the equation.
16 + -16 + 5r = 31 + -16

Combine like terms: 16 + -16 = 0
0 + 5r = 31 + -16
5r = 31 + -16

Combine like terms: 31 + -16 = 15
5r = 15

Divide each side by '5'.
r = 3

Simplifying
r = 3

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