9-31=Y

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Solution for 9-31=Y equation:


Simplifying
9 + -31 = Y

Combine like terms: 9 + -31 = -22
-22 = Y

Solving
-22 = 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.
-22 + -1Y = Y + -1Y

Combine like terms: Y + -1Y = 0
-22 + -1Y = 0

Add '22' to each side of the equation.
-22 + 22 + -1Y = 0 + 22

Combine like terms: -22 + 22 = 0
0 + -1Y = 0 + 22
-1Y = 0 + 22

Combine like terms: 0 + 22 = 22
-1Y = 22

Divide each side by '-1'.
Y = -22

Simplifying
Y = -22

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