-4y+4y+-9=15+-4y

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Solution for -4y+4y+-9=15+-4y equation:


Simplifying
-4y + 4y + -9 = 15 + -4y

Reorder the terms:
-9 + -4y + 4y = 15 + -4y

Combine like terms: -4y + 4y = 0
-9 + 0 = 15 + -4y
-9 = 15 + -4y

Solving
-9 = 15 + -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 + 4y = 15 + -4y + 4y

Combine like terms: -4y + 4y = 0
-9 + 4y = 15 + 0
-9 + 4y = 15

Add '9' to each side of the equation.
-9 + 9 + 4y = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 4y = 15 + 9
4y = 15 + 9

Combine like terms: 15 + 9 = 24
4y = 24

Divide each side by '4'.
y = 6

Simplifying
y = 6

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