7+5=y-4

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Solution for 7+5=y-4 equation: 


Simplifying
7 + 5 = y + -4

Combine like terms: 7 + 5 = 12
12 = y + -4

Reorder the terms:
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 = -16
-1y = -16

Divide each side by '-1'.
y = 16

Simplifying
y = 16

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