(-0.75x-9)-(3.5x+6.4)=

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Solution for (-0.75x-9)-(3.5x+6.4)= equation: 


Simplifying
(-0.75x + -9) + -1(3.5x + 6.4) = 0

Reorder the terms:
(-9 + -0.75x) + -1(3.5x + 6.4) = 0

Remove parenthesis around (-9 + -0.75x)
-9 + -0.75x + -1(3.5x + 6.4) = 0

Reorder the terms:
-9 + -0.75x + -1(6.4 + 3.5x) = 0
-9 + -0.75x + (6.4 * -1 + 3.5x * -1) = 0
-9 + -0.75x + (-6.4 + -3.5x) = 0

Reorder the terms:
-9 + -6.4 + -0.75x + -3.5x = 0

Combine like terms: -9 + -6.4 = -15.4
-15.4 + -0.75x + -3.5x = 0

Combine like terms: -0.75x + -3.5x = -4.25x
-15.4 + -4.25x = 0

Solving
-15.4 + -4.25x = 0

Solving for variable 'x'.

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

Add '15.4' to each side of the equation.
-15.4 + 15.4 + -4.25x = 0 + 15.4

Combine like terms: -15.4 + 15.4 = 0.0
0.0 + -4.25x = 0 + 15.4
-4.25x = 0 + 15.4

Combine like terms: 0 + 15.4 = 15.4
-4.25x = 15.4

Divide each side by '-4.25'.
x = -3.623529412

Simplifying
x = -3.623529412

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