3.9=-0.65(x+8)

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


Simplifying
3.9 = -0.65(x + 8)

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

Solving
3.9 = -5.2 + -0.65x

Solving for variable 'x'.

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

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

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

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

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

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

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

Simplifying
x = -14

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