3y+9=4y-8

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Solution for 3y+9=4y-8 equation:


Simplifying
3y + 9 = 4y + -8

Reorder the terms:
9 + 3y = 4y + -8

Reorder the terms:
9 + 3y = -8 + 4y

Solving
9 + 3y = -8 + 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 + 3y + -4y = -8 + 4y + -4y

Combine like terms: 3y + -4y = -1y
9 + -1y = -8 + 4y + -4y

Combine like terms: 4y + -4y = 0
9 + -1y = -8 + 0
9 + -1y = -8

Add '-9' to each side of the equation.
9 + -9 + -1y = -8 + -9

Combine like terms: 9 + -9 = 0
0 + -1y = -8 + -9
-1y = -8 + -9

Combine like terms: -8 + -9 = -17
-1y = -17

Divide each side by '-1'.
y = 17

Simplifying
y = 17

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