Respuesta :
9514 1404 393
Answer:
- 6 days
- 210 pages
Step-by-step explanation:
1. The number of pages (y) Amir reads in x days is ...
y = 35x
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2. Jessie has been reading 1 more day than Amir, so an expression for the number of days Jessie has been reading is ...
x +1
The number of pages Jessie has read is ...
y = 30(x +1)
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3. The system of equations is the two of these equations written together:
- y = 35x
- y = 30(x +1)
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4. Using substitution to solve this, we find it convenient to substitute for y. Either equation provides an expression for y that can be substituted into the other equation. After substitution, the equation looks like ...
35x = 30(x +1)
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5. We can subtract 30x from both sides and divide by 5 to solve.
35x -30x = 30(x +1) -30x
5x = 30x +30 -30x
5x = 30 . . . . simplified form after subtracting 30
x = 6 . . . . . . .result of dividing both sides by 5
y = 35x = 35·6 = 210
(x, y) = (6, 210)
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6. It takes Amir 6 days to catch Jessie. At that time, both will have read 210 pages.