In the following diagram, bc is parallel to de 30 points

∠x =

Step-by-step explanation:

Since /BC/ ll /DE/, then ∠CBA = ∠DAB  (alternate angles)

Thus,

       ∠DAB + + x = (sum of angles on a straight line)

 ⇒       + + x =  

          + x =

make 'x' the subject of the formula,

       x = -

∴     x   =

x=1.1

Step-by-step explanation:

Distribute 2

-2(x+6) = -2x-12

1. 6-2x-12=3x-0.5

6-12=-6

Collect like terms

2. -2x-3x=-0.5+6

-5x=5.5

3. Divide each side by 5

-5x/5=5.5/5

x=1.1