3=5-2(3+4x)

Solution for 3=5-2(3+4x) equation:

Simplifying
3 = 5 + -2(3 + 4x)
3 = 5 + (3 * -2 + 4x * -2)
3 = 5 + (-6 + -8x)

Combine like terms: 5 + -6 = -1
3 = -1 + -8x

Solving
3 = -1 + -8x

Solving for variable 'x'.

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

Add '8x' to each side of the equation.
3 + 8x = -1 + -8x + 8x

Combine like terms: -8x + 8x = 0
3 + 8x = -1 + 0
3 + 8x = -1

Add '-3' to each side of the equation.
3 + -3 + 8x = -1 + -3

Combine like terms: 3 + -3 = 0
0 + 8x = -1 + -3
8x = -1 + -3

Combine like terms: -1 + -3 = -4
8x = -4

Divide each side by '8'.
x = -0.5

Simplifying
x = -0.5