3y+5+4y-1=9y-12

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Solution for 3y+5+4y-1=9y-12 equation:


Simplifying
3y + 5 + 4y + -1 = 9y + -12

Reorder the terms:
5 + -1 + 3y + 4y = 9y + -12

Combine like terms: 5 + -1 = 4
4 + 3y + 4y = 9y + -12

Combine like terms: 3y + 4y = 7y
4 + 7y = 9y + -12

Reorder the terms:
4 + 7y = -12 + 9y

Solving
4 + 7y = -12 + 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
4 + 7y + -9y = -12 + 9y + -9y

Combine like terms: 7y + -9y = -2y
4 + -2y = -12 + 9y + -9y

Combine like terms: 9y + -9y = 0
4 + -2y = -12 + 0
4 + -2y = -12

Add '-4' to each side of the equation.
4 + -4 + -2y = -12 + -4

Combine like terms: 4 + -4 = 0
0 + -2y = -12 + -4
-2y = -12 + -4

Combine like terms: -12 + -4 = -16
-2y = -16

Divide each side by '-2'.
y = 8

Simplifying
y = 8

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