x+2.9=7.8

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Solution for x+2.9=7.8 equation: 


Simplifying
x + 2.9 = 7.8

Reorder the terms:
2.9 + x = 7.8

Solving
2.9 + x = 7.8

Solving for variable 'x'.

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

Add '-2.9' to each side of the equation.
2.9 + -2.9 + x = 7.8 + -2.9

Combine like terms: 2.9 + -2.9 = 0.0
0.0 + x = 7.8 + -2.9
x = 7.8 + -2.9

Combine like terms: 7.8 + -2.9 = 4.9
x = 4.9

Simplifying
x = 4.9

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