-5y+12y+9=4y+42

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Solution for -5y+12y+9=4y+42 equation:


Simplifying
-5y + 12y + 9 = 4y + 42

Reorder the terms:
9 + -5y + 12y = 4y + 42

Combine like terms: -5y + 12y = 7y
9 + 7y = 4y + 42

Reorder the terms:
9 + 7y = 42 + 4y

Solving
9 + 7y = 42 + 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 = 42 + 4y + -4y

Combine like terms: 7y + -4y = 3y
9 + 3y = 42 + 4y + -4y

Combine like terms: 4y + -4y = 0
9 + 3y = 42 + 0
9 + 3y = 42

Add '-9' to each side of the equation.
9 + -9 + 3y = 42 + -9

Combine like terms: 9 + -9 = 0
0 + 3y = 42 + -9
3y = 42 + -9

Combine like terms: 42 + -9 = 33
3y = 33

Divide each side by '3'.
y = 11

Simplifying
y = 11

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