12=4+y

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Solution for 12=4+y equation:


Simplifying
12 = 4 + y

Solving
12 = 4 + 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 = 4 + y + -1y

Combine like terms: y + -1y = 0
12 + -1y = 4 + 0
12 + -1y = 4

Add '-12' to each side of the equation.
12 + -12 + -1y = 4 + -12

Combine like terms: 12 + -12 = 0
0 + -1y = 4 + -12
-1y = 4 + -12

Combine like terms: 4 + -12 = -8
-1y = -8

Divide each side by '-1'.
y = 8

Simplifying
y = 8

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