42=12+y

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Solution for 42=12+y equation:


Simplifying
42 = 12 + y

Solving
42 = 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.
42 + -1y = 12 + y + -1y

Combine like terms: y + -1y = 0
42 + -1y = 12 + 0
42 + -1y = 12

Add '-42' to each side of the equation.
42 + -42 + -1y = 12 + -42

Combine like terms: 42 + -42 = 0
0 + -1y = 12 + -42
-1y = 12 + -42

Combine like terms: 12 + -42 = -30
-1y = -30

Divide each side by '-1'.
y = 30

Simplifying
y = 30

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