9=3x+2(-4x)

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Solution for 9=3x+2(-4x) equation:


Simplifying
9 = 3x + 2(-4x)

Remove parenthesis around (-4x)
9 = 3x + 2 * -4x

Multiply 2 * -4
9 = 3x + -8x

Combine like terms: 3x + -8x = -5x
9 = -5x

Solving
9 = -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
9 + 5x = -5x + 5x

Combine like terms: -5x + 5x = 0
9 + 5x = 0

Add '-9' to each side of the equation.
9 + -9 + 5x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 5x = 0 + -9
5x = 0 + -9

Combine like terms: 0 + -9 = -9
5x = -9

Divide each side by '5'.
x = -1.8

Simplifying
x = -1.8

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