x+4.2=8.7

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Solution for x+4.2=8.7 equation: 


Simplifying
x + 4.2 = 8.7

Reorder the terms:
4.2 + x = 8.7

Solving
4.2 + x = 8.7

Solving for variable 'x'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + x = 8.7 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + x = 8.7 + -4.2
x = 8.7 + -4.2

Combine like terms: 8.7 + -4.2 = 4.5
x = 4.5

Simplifying
x = 4.5

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