The answer is x=-7 and x=-1
Answer:
D. $680
Step By Step Explanation:
100 pages are typed. Each page coast $5 to type.
100 x 5 = 500
40 pages are revised once. It costs $3 to revise a page once.
40 x 3 = 120
10 pages are revised twice. It costs $3 to revise a page once so it will cost $6 to revise it twice
10 x 6 = 60
To find the total cost we add all the amounts together
500 + 120 + 60 = 680
The final answer is $680
2.64 divided by 6 equals 0.44. one ounce costs 44 cents
<span>2x + x = 12
=> x =12/3 =4
so, original number is 84.</span>
