2 = 1 hour
x = 6 1/3
2 * 6 1/3 = 12 2/3
Answer:
Step-by-step explanation:
x^2-4/7x-12/49=0
x= 6/7 and -2/7
The answer is 80 because you add then subtract
a is given to us so just plug a into the first equation:
b-3 - 3b =9
Add 3 to both sides:
b-3b=12
Combine like terms:
-2b=12
Divide by -2 to get b by itself:
b=-6
The only answer with b as -6 is the first one, (-9,-6)
