For 13. the answer is w = -1.
Here are the steps
1. subtract 5 from both sides ( 3w = 2 - 5)
2. simplify 2 - 5 to -3 (3w = -3)
3. divide both sides by 3 ( finally the answer is w = -1.
)
Answer:
Option 2 is correct that could be used to solve the problem.
Step-by-step explanation:
Present age of Mary is x
And present age of John is y
Since, john is 5 years older than Mary hence, we get
y=x+5
In 10 years twice john's age is decreased by Mary's age by 35
2(y+10)-(x+10)=35
hence, Option 2 is correct which could be use to solve the problem.
Answer:

Step-by-step explanation:
Convert mixed numbers to improper fractions: 
[Formula to convert mixed to improper:
]
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Find least common multiplier of 2, 3: 6
[Multiply by LCM = 6]
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Simplify: 
Divide both sides by 37
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Which is then simplified to 6
There are 0.0625 pounds in an ounce.
The answer is a. 7 + u = 14; u = 7