4=Y-9

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Solution for 4=Y-9 equation:


Simplifying
4 = Y + -9

Reorder the terms:
4 = -9 + Y

Solving
4 = -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.
4 + -1Y = -9 + Y + -1Y

Combine like terms: Y + -1Y = 0
4 + -1Y = -9 + 0
4 + -1Y = -9

Add '-4' to each side of the equation.
4 + -4 + -1Y = -9 + -4

Combine like terms: 4 + -4 = 0
0 + -1Y = -9 + -4
-1Y = -9 + -4

Combine like terms: -9 + -4 = -13
-1Y = -13

Divide each side by '-1'.
Y = 13

Simplifying
Y = 13

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