3-4(1+2r)=

Solution for 3-4(1+2r)= equation:

Simplifying
3 + -4(1 + 2r) = 0
3 + (1 * -4 + 2r * -4) = 0
3 + (-4 + -8r) = 0

Combine like terms: 3 + -4 = -1
-1 + -8r = 0

Solving
-1 + -8r = 0

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + 1 + -8r = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -8r = 0 + 1
-8r = 0 + 1

Combine like terms: 0 + 1 = 1
-8r = 1

Divide each side by '-8'.
r = -0.125

Simplifying
r = -0.125