4=7x+2(-8x)

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Solution for 4=7x+2(-8x) equation:


Simplifying
4 = 7x + 2(-8x)

Remove parenthesis around (-8x)
4 = 7x + 2 * -8x

Multiply 2 * -8
4 = 7x + -16x

Combine like terms: 7x + -16x = -9x
4 = -9x

Solving
4 = -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
4 + 9x = -9x + 9x

Combine like terms: -9x + 9x = 0
4 + 9x = 0

Add '-4' to each side of the equation.
4 + -4 + 9x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 9x = 0 + -4
9x = 0 + -4

Combine like terms: 0 + -4 = -4
9x = -4

Divide each side by '9'.
x = -0.4444444444

Simplifying
x = -0.4444444444

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