2.5+r=7

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Solution for 2.5+r=7 equation: 


Simplifying
2.5 + r = 7

Solving
2.5 + r = 7

Solving for variable 'r'.

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

Add '-2.5' to each side of the equation.
2.5 + -2.5 + r = 7 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + r = 7 + -2.5
r = 7 + -2.5

Combine like terms: 7 + -2.5 = 4.5
r = 4.5

Simplifying
r = 4.5

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