Answer:
He didn't add 13 to 26
Step-by-step explanation:
he would need to add -13+13 to get rid of it. and add 13 on the other side 13+26
X={6,-10} that is the answer
We already know that the speed of light is 299,792 km/s.
225,000,000 km* (1 s/ 299,792 km) ≈ 751 s.
(Note that the unit cancels out so you get the answer)
It takes light about 751 seconds from the Sun to reach Mars~
