3+8x+4x*2=0

Solution for 3+8x+4x*2=0 equation:

Simplifying
3 + 8x + 4x * 2 = 0

Reorder the terms for easier multiplication:
3 + 8x + 4 * 2x = 0

Multiply 4 * 2
3 + 8x + 8x = 0

Combine like terms: 8x + 8x = 16x
3 + 16x = 0

Solving
3 + 16x = 0

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 16x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 16x = 0 + -3
16x = 0 + -3

Combine like terms: 0 + -3 = -3
16x = -3

Divide each side by '16'.
x = -0.1875

Simplifying
x = -0.1875