20y+80=30

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Solution for 20y+80=30 equation: 


Simplifying
20y + 80 = 30

Reorder the terms:
80 + 20y = 30

Solving
80 + 20y = 30

Solving for variable 'y'.

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

Add '-80' to each side of the equation.
80 + -80 + 20y = 30 + -80

Combine like terms: 80 + -80 = 0
0 + 20y = 30 + -80
20y = 30 + -80

Combine like terms: 30 + -80 = -50
20y = -50

Divide each side by '20'.
y = -2.5

Simplifying
y = -2.5

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