6.5y-5.5y+6.9=6.1-6.9

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Solution for 6.5y-5.5y+6.9=6.1-6.9 equation: 


Simplifying
6.5y + -5.5y + 6.9 = 6.1 + -6.9

Reorder the terms:
6.9 + 6.5y + -5.5y = 6.1 + -6.9

Combine like terms: 6.5y + -5.5y = 1y
6.9 + 1y = 6.1 + -6.9

Combine like terms: 6.1 + -6.9 = -0.8
6.9 + 1y = -0.8

Solving
6.9 + 1y = -0.8

Solving for variable 'y'.

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

Add '-6.9' to each side of the equation.
6.9 + -6.9 + 1y = -0.8 + -6.9

Combine like terms: 6.9 + -6.9 = 0.0
0.0 + 1y = -0.8 + -6.9
1y = -0.8 + -6.9

Combine like terms: -0.8 + -6.9 = -7.7
1y = -7.7

Divide each side by '1'.
y = -7.7

Simplifying
y = -7.7

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