13=9-8y

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Solution for 13=9-8y equation:


Simplifying
13 = 9 + -8y

Solving
13 = 9 + -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.
13 + 8y = 9 + -8y + 8y

Combine like terms: -8y + 8y = 0
13 + 8y = 9 + 0
13 + 8y = 9

Add '-13' to each side of the equation.
13 + -13 + 8y = 9 + -13

Combine like terms: 13 + -13 = 0
0 + 8y = 9 + -13
8y = 9 + -13

Combine like terms: 9 + -13 = -4
8y = -4

Divide each side by '8'.
y = -0.5

Simplifying
y = -0.5

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