3-12=5y-4y+9

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Solution for 3-12=5y-4y+9 equation:


Simplifying
3 + -12 = 5y + -4y + 9

Combine like terms: 3 + -12 = -9
-9 = 5y + -4y + 9

Reorder the terms:
-9 = 9 + 5y + -4y

Combine like terms: 5y + -4y = 1y
-9 = 9 + 1y

Solving
-9 = 9 + 1y

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.
-9 + -1y = 9 + 1y + -1y

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

Add '9' to each side of the equation.
-9 + 9 + -1y = 9 + 9

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

Combine like terms: 9 + 9 = 18
-1y = 18

Divide each side by '-1'.
y = -18

Simplifying
y = -18

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