31=4-8y

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Solution for 31=4-8y equation:


Simplifying
31 = 4 + -8y

Solving
31 = 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.
31 + 8y = 4 + -8y + 8y

Combine like terms: -8y + 8y = 0
31 + 8y = 4 + 0
31 + 8y = 4

Add '-31' to each side of the equation.
31 + -31 + 8y = 4 + -31

Combine like terms: 31 + -31 = 0
0 + 8y = 4 + -31
8y = 4 + -31

Combine like terms: 4 + -31 = -27
8y = -27

Divide each side by '8'.
y = -3.375

Simplifying
y = -3.375

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