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Question 2:
Jane has
twice as many books as Peter. Jane and Peter
combined have 12 books. How many books do they each
have?
Let 'x' equal the number of
books Peter has
(We
use 'x' for the person we don't know anything
about)
Therefore
Jane has 2 times 'x' books.
(We
write this as 2x books.)
Combined they
have 12 books.
We write this
in the form of an equation and then proceed to
solve it:
(An
equation is when two things are
equal)
The equation
is solved using the same means as in normal
arithmatic.
- -
-----------------12
= The number Peter has + the number Jane
has
---- --....--
- - -------
Peter---Jane
----
--... - -- -------
/
/-- -
- -
/
-----------------
12 = x +
2x
-----------------
12 = 3x
--------(Add
the 'x's
together)------------
------- ---
12
÷ 3 =
x--------(Divide
both sides by 3 to get a single 'x')
----------
-------x
=
4-------
Click on the answer below you
believe is the correct one
Answer to
question 2:
'A' - Peter
has 4 books. Jane has 3 books
'B' -
Peter
has 4 books. Jane has 4 books
'C' -
Peter
has 4 books. Jane has 6 books
'D' -
Peter
has 4 books. Jane has 8 books
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