x+2.8=45

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Solution for x+2.8=45 equation: 


Simplifying
x + 2.8 = 45

Reorder the terms:
2.8 + x = 45

Solving
2.8 + x = 45

Solving for variable 'x'.

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

Add '-2.8' to each side of the equation.
2.8 + -2.8 + x = 45 + -2.8

Combine like terms: 2.8 + -2.8 = 0.0
0.0 + x = 45 + -2.8
x = 45 + -2.8

Combine like terms: 45 + -2.8 = 42.2
x = 42.2

Simplifying
x = 42.2

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