20-5y=2.8

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Solution for 20-5y=2.8 equation: 


Simplifying
20 + -5y = 2.8

Solving
20 + -5y = 2.8

Solving for variable 'y'.

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

Add '-20' to each side of the equation.
20 + -20 + -5y = 2.8 + -20

Combine like terms: 20 + -20 = 0
0 + -5y = 2.8 + -20
-5y = 2.8 + -20

Combine like terms: 2.8 + -20 = -17.2
-5y = -17.2

Divide each side by '-5'.
y = 3.44

Simplifying
y = 3.44

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