9y-1=8y+4

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Solution for 9y-1=8y+4 equation:


Simplifying
9y + -1 = 8y + 4

Reorder the terms:
-1 + 9y = 8y + 4

Reorder the terms:
-1 + 9y = 4 + 8y

Solving
-1 + 9y = 4 + 8y

Solving for variable 'y'.

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

Add '-8y' to each side of the equation.
-1 + 9y + -8y = 4 + 8y + -8y

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

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

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

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

Combine like terms: 4 + 1 = 5
1y = 5

Divide each side by '1'.
y = 5

Simplifying
y = 5

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