3=4x+2(-4x)

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


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

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

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

Combine like terms: 4x + -8x = -4x
3 = -4x

Solving
3 = -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
3 + 4x = -4x + 4x

Combine like terms: -4x + 4x = 0
3 + 4x = 0

Add '-3' to each side of the equation.
3 + -3 + 4x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 4x = 0 + -3
4x = 0 + -3

Combine like terms: 0 + -3 = -3
4x = -3

Divide each side by '4'.
x = -0.75

Simplifying
x = -0.75

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