(7+y)-7=a-7

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Solution for (7+y)-7=a-7 equation: 


Simplifying
(7 + y) + -7 = a + -7

Remove parenthesis around (7 + y)
7 + y + -7 = a + -7

Reorder the terms:
7 + -7 + y = a + -7

Combine like terms: 7 + -7 = 0
0 + y = a + -7
y = a + -7

Reorder the terms:
y = -7 + a

Solving
y = -7 + a

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Simplifying
y = -7 + a

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