9y-7=4y+8

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Solution for 9y-7=4y+8 equation:


Simplifying
9y + -7 = 4y + 8

Reorder the terms:
-7 + 9y = 4y + 8

Reorder the terms:
-7 + 9y = 8 + 4y

Solving
-7 + 9y = 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.
-7 + 9y + -4y = 8 + 4y + -4y

Combine like terms: 9y + -4y = 5y
-7 + 5y = 8 + 4y + -4y

Combine like terms: 4y + -4y = 0
-7 + 5y = 8 + 0
-7 + 5y = 8

Add '7' to each side of the equation.
-7 + 7 + 5y = 8 + 7

Combine like terms: -7 + 7 = 0
0 + 5y = 8 + 7
5y = 8 + 7

Combine like terms: 8 + 7 = 15
5y = 15

Divide each side by '5'.
y = 3

Simplifying
y = 3

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