42=y-9

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Solution for 42=y-9 equation:


Simplifying
42 = y + -9

Reorder the terms:
42 = -9 + y

Solving
42 = -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.
42 + -1y = -9 + y + -1y

Combine like terms: y + -1y = 0
42 + -1y = -9 + 0
42 + -1y = -9

Add '-42' to each side of the equation.
42 + -42 + -1y = -9 + -42

Combine like terms: 42 + -42 = 0
0 + -1y = -9 + -42
-1y = -9 + -42

Combine like terms: -9 + -42 = -51
-1y = -51

Divide each side by '-1'.
y = 51

Simplifying
y = 51

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