(4-y)=7

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Solution for (4-y)=7 equation: 


Simplifying
(4 + -1y) = 7

Remove parenthesis around (4 + -1y)
4 + -1y = 7

Solving
4 + -1y = 7

Solving for variable 'y'.

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

Add '-4' to each side of the equation.
4 + -4 + -1y = 7 + -4

Combine like terms: 4 + -4 = 0
0 + -1y = 7 + -4
-1y = 7 + -4

Combine like terms: 7 + -4 = 3
-1y = 3

Divide each side by '-1'.
y = -3

Simplifying
y = -3

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