12.8+12.6+x+11.8+9.7=12.3

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Solution for 12.8+12.6+x+11.8+9.7=12.3 equation: 


Simplifying
12.8 + 12.6 + x + 11.8 + 9.7 = 12.3

Reorder the terms:
12.8 + 12.6 + 11.8 + 9.7 + x = 12.3

Combine like terms: 12.8 + 12.6 = 25.4
25.4 + 11.8 + 9.7 + x = 12.3

Combine like terms: 25.4 + 11.8 = 37.2
37.2 + 9.7 + x = 12.3

Combine like terms: 37.2 + 9.7 = 46.9
46.9 + x = 12.3

Solving
46.9 + x = 12.3

Solving for variable 'x'.

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

Add '-46.9' to each side of the equation.
46.9 + -46.9 + x = 12.3 + -46.9

Combine like terms: 46.9 + -46.9 = 0.0
0.0 + x = 12.3 + -46.9
x = 12.3 + -46.9

Combine like terms: 12.3 + -46.9 = -34.6
x = -34.6

Simplifying
x = -34.6

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