I think she put 32 books in each pile because 229/7=32.7 but if I was asked to round it it would be 33.
5+2=7
Multiply each side by 3.
7(9x + 3) = 30
Expand the brackets
63x + 21 = 30
Subtract both sides by 21
63x = 9
Divide both sides by 63
X = 1/7
( always sub answers back in to question to make sure it’s right )
Answer:
3 i
Step-by-step explanation:
Note = i
Given
=
= × ×
= 3 i
Answers:
- Sam's current age = 24
- The mother's current age = 48
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Explanation:
s = Sam's age right now
2s = the mother's age right now, since she is twice as old as Sam currently.
In 12 years time, Sam will be s+12 years old.
12 years ago from this current year, the mother was 2s-12 years old.
Since we're told these future and past ages line up, this means s+12 and 2s-12 are the same value
Set the expressions equal to one another and solve for s.
s+12 = 2s-12
s-2s = -12-12
-s = -24
s = 24
Sam is currently 24 years old.
His mother is currently 2s = 2*24 = 48 years old.
12 years ago, his mother was 2s-12 = 48-12 = 36 years old.
12 years from now, Sam will be s+12 = 24+12 = 36 years old.
Since we get 36 each time, this confirms we have the correct answers.