Answer:
2d
Step-by-step explanation:
Im guessing 2 is also being added. Well basically you add 8 2 and negative 10, which gives you zero, and the value that is left from that is 2d, so its 2d
Answer:
8
Step-by-step explanation:
That is the quetion that sal khan explaind in the vid BOI

Cross multiply.
5.4x=9*25.8
5.4x=232.2 Divide both sides by 5.4
x=43