8.6=2.1+(-1.3y)

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Solution for 8.6=2.1+(-1.3y) equation:


Simplifying
8.6 = 2.1 + (-1.3y)

Solving
8.6 = 2.1 + (-1.3y)

Solving for variable 'y'.

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

Add '(1.3y)' to each side of the equation.
8.6 + (1.3y) = 2.1 + (-1.3y) + (1.3y)

Combine like terms: (-1.3y) + (1.3y) = 0.0
8.6 + (1.3y) = 2.1 + 0.0
8.6 + (1.3y) = 2.1

Add '-8.6' to each side of the equation.
8.6 + -8.6 + (1.3y) = 2.1 + -8.6

Combine like terms: 8.6 + -8.6 = 0.0
0.0 + (1.3y) = 2.1 + -8.6
(1.3y) = 2.1 + -8.6

Combine like terms: 2.1 + -8.6 = -6.5
(1.3y) = -6.5

Divide each side by '1.3'.
y = -5

Simplifying
y = -5

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