85=8y+21

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Solution for 85=8y+21 equation:


Simplifying
85 = 8y + 21

Reorder the terms:
85 = 21 + 8y

Solving
85 = 21 + 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.
85 + -8y = 21 + 8y + -8y

Combine like terms: 8y + -8y = 0
85 + -8y = 21 + 0
85 + -8y = 21

Add '-85' to each side of the equation.
85 + -85 + -8y = 21 + -85

Combine like terms: 85 + -85 = 0
0 + -8y = 21 + -85
-8y = 21 + -85

Combine like terms: 21 + -85 = -64
-8y = -64

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

Simplifying
y = 8

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