3.9=-0.65(y+8)

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Solution for 3.9=-0.65(y+8) equation: 


Simplifying
3.9 = -0.65(y + 8)

Reorder the terms:
3.9 = -0.65(8 + y)
3.9 = (8 * -0.65 + y * -0.65)
3.9 = (-5.2 + -0.65y)

Solving
3.9 = -5.2 + -0.65y

Solving for variable 'y'.

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

Add '0.65y' to each side of the equation.
3.9 + 0.65y = -5.2 + -0.65y + 0.65y

Combine like terms: -0.65y + 0.65y = 0.00
3.9 + 0.65y = -5.2 + 0.00
3.9 + 0.65y = -5.2

Add '-3.9' to each side of the equation.
3.9 + -3.9 + 0.65y = -5.2 + -3.9

Combine like terms: 3.9 + -3.9 = 0.0
0.0 + 0.65y = -5.2 + -3.9
0.65y = -5.2 + -3.9

Combine like terms: -5.2 + -3.9 = -9.1
0.65y = -9.1

Divide each side by '0.65'.
y = -14

Simplifying
y = -14

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