D. Hope this helps 13.9027 :)
Answer:

Step-by-step explanation:
Collect like terms

Collect like terms again and you get 
Hope this helps ʕ•ᴥ•ʔ
Area of a parallelogram is base x height
48x14=672
Turn 34 into an improper fraction ( 34/1 ) and multiply it by 3/4. You get 20 1/2
1 - 3x = x + 3 |subtract 1 from both sides
-3x = x + 2 |subtract x from both sides
-4x = 2 |divide both sides by (-4)
x = 2/-4
x = -0.5