(y-5)-(y+9)=7y

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Solution for (y-5)-(y+9)=7y equation:


Simplifying
(y + -5) + -1(y + 9) = 7y

Reorder the terms:
(-5 + y) + -1(y + 9) = 7y

Remove parenthesis around (-5 + y)
-5 + y + -1(y + 9) = 7y

Reorder the terms:
-5 + y + -1(9 + y) = 7y
-5 + y + (9 * -1 + y * -1) = 7y
-5 + y + (-9 + -1y) = 7y

Reorder the terms:
-5 + -9 + y + -1y = 7y

Combine like terms: -5 + -9 = -14
-14 + y + -1y = 7y

Combine like terms: y + -1y = 0
-14 + 0 = 7y
-14 = 7y

Solving
-14 = 7y

Solving for variable 'y'.

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

Add '-7y' to each side of the equation.
-14 + -7y = 7y + -7y

Combine like terms: 7y + -7y = 0
-14 + -7y = 0

Add '14' to each side of the equation.
-14 + 14 + -7y = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -7y = 0 + 14
-7y = 0 + 14

Combine like terms: 0 + 14 = 14
-7y = 14

Divide each side by '-7'.
y = -2

Simplifying
y = -2

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