Answer:
y = 2x + 6
Step-by-step explanation:
10x - 5y = -30
-5y = -10x - 30
y = 2x + 6
We can use proportion here. As we know, cost of a rocker is now 80% of original.
So:
crossmultiplying
- aswer
In 12 hours
you read: 50 x 12 = 60 pages
your sister reads: 40 x 12 = 48 pages
60 - 48 = 12 pages
answer
you read 12 more pages than you sister in 12 hours