7y-9=4y

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Solution for 7y-9=4y equation:


Simplifying
7y + -9 = 4y

Reorder the terms:
-9 + 7y = 4y

Solving
-9 + 7y = 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
-9 + 7y + -4y = 4y + -4y

Combine like terms: 7y + -4y = 3y
-9 + 3y = 4y + -4y

Combine like terms: 4y + -4y = 0
-9 + 3y = 0

Add '9' to each side of the equation.
-9 + 9 + 3y = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 3y = 0 + 9
3y = 0 + 9

Combine like terms: 0 + 9 = 9
3y = 9

Divide each side by '3'.
y = 3

Simplifying
y = 3

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