9.8=9.9+y

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Solution for 9.8=9.9+y equation:


Simplifying
9.8 = 9.9 + y

Solving
9.8 = 9.9 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
9.8 + -1y = 9.9 + y + -1y

Combine like terms: y + -1y = 0
9.8 + -1y = 9.9 + 0
9.8 + -1y = 9.9

Add '-9.8' to each side of the equation.
9.8 + -9.8 + -1y = 9.9 + -9.8

Combine like terms: 9.8 + -9.8 = 0.0
0.0 + -1y = 9.9 + -9.8
-1y = 9.9 + -9.8

Combine like terms: 9.9 + -9.8 = 0.1
-1y = 0.1

Divide each side by '-1'.
y = -0.1

Simplifying
y = -0.1

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