7-9=y-4

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Solution for 7-9=y-4 equation:


Simplifying
7 + -9 = y + -4

Combine like terms: 7 + -9 = -2
-2 = y + -4

Reorder the terms:
-2 = -4 + y

Solving
-2 = -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.
-2 + -1y = -4 + y + -1y

Combine like terms: y + -1y = 0
-2 + -1y = -4 + 0
-2 + -1y = -4

Add '2' to each side of the equation.
-2 + 2 + -1y = -4 + 2

Combine like terms: -2 + 2 = 0
0 + -1y = -4 + 2
-1y = -4 + 2

Combine like terms: -4 + 2 = -2
-1y = -2

Divide each side by '-1'.
y = 2

Simplifying
y = 2

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