r+9.4=4.2

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Solution for r+9.4=4.2 equation: 


Simplifying
r + 9.4 = 4.2

Reorder the terms:
9.4 + r = 4.2

Solving
9.4 + r = 4.2

Solving for variable 'r'.

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

Add '-9.4' to each side of the equation.
9.4 + -9.4 + r = 4.2 + -9.4

Combine like terms: 9.4 + -9.4 = 0.0
0.0 + r = 4.2 + -9.4
r = 4.2 + -9.4

Combine like terms: 4.2 + -9.4 = -5.2
r = -5.2

Simplifying
r = -5.2

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