3y-7=y-9

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Solution for 3y-7=y-9 equation:


Simplifying
3y + -7 = y + -9

Reorder the terms:
-7 + 3y = y + -9

Reorder the terms:
-7 + 3y = -9 + y

Solving
-7 + 3y = -9 + 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.
-7 + 3y + -1y = -9 + y + -1y

Combine like terms: 3y + -1y = 2y
-7 + 2y = -9 + y + -1y

Combine like terms: y + -1y = 0
-7 + 2y = -9 + 0
-7 + 2y = -9

Add '7' to each side of the equation.
-7 + 7 + 2y = -9 + 7

Combine like terms: -7 + 7 = 0
0 + 2y = -9 + 7
2y = -9 + 7

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

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

Simplifying
y = -1

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