13-1=y

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Solution for 13-1=y equation:


Simplifying
13 + -1 = y

Combine like terms: 13 + -1 = 12
12 = y

Solving
12 = 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.
12 + -1y = y + -1y

Combine like terms: y + -1y = 0
12 + -1y = 0

Add '-12' to each side of the equation.
12 + -12 + -1y = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -1y = 0 + -12
-1y = 0 + -12

Combine like terms: 0 + -12 = -12
-1y = -12

Divide each side by '-1'.
y = 12

Simplifying
y = 12

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