r+2.5=12-3r

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Solution for r+2.5=12-3r equation: 


Simplifying
r + 2.5 = 12 + -3r

Reorder the terms:
2.5 + r = 12 + -3r

Solving
2.5 + r = 12 + -3r

Solving for variable 'r'.

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

Add '3r' to each side of the equation.
2.5 + r + 3r = 12 + -3r + 3r

Combine like terms: r + 3r = 4r
2.5 + 4r = 12 + -3r + 3r

Combine like terms: -3r + 3r = 0
2.5 + 4r = 12 + 0
2.5 + 4r = 12

Add '-2.5' to each side of the equation.
2.5 + -2.5 + 4r = 12 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + 4r = 12 + -2.5
4r = 12 + -2.5

Combine like terms: 12 + -2.5 = 9.5
4r = 9.5

Divide each side by '4'.
r = 2.375

Simplifying
r = 2.375

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