3y+4=4y-9

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


Simplifying
3y + 4 = 4y + -9

Reorder the terms:
4 + 3y = 4y + -9

Reorder the terms:
4 + 3y = -9 + 4y

Solving
4 + 3y = -9 + 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.
4 + 3y + -4y = -9 + 4y + -4y

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

Combine like terms: 4y + -4y = 0
4 + -1y = -9 + 0
4 + -1y = -9

Add '-4' to each side of the equation.
4 + -4 + -1y = -9 + -4

Combine like terms: 4 + -4 = 0
0 + -1y = -9 + -4
-1y = -9 + -4

Combine like terms: -9 + -4 = -13
-1y = -13

Divide each side by '-1'.
y = 13

Simplifying
y = 13

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