6+3x=x-8 subtract 6 from both sides
3x=x-14 subtract x from both sides
2x=-14 divide both sides by 2
x=-7
This equation thus has just one solution.
If they both did it together it should only take them about 20 to 25 to complete it
Set up a proportion. If 12 3/5 feet can be traveled in one minute, then make that a fraction. 12 3/5 over one equals X over 30. Cross multiply 12 3/5×30 equals 1 X and solve.
I've used 2 methods Gauss and Cramer to determine the solution choose the one that fits you. Anyway as you can see the answer is D.
Answer:71
Step-by-step explanation: