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raketka [301]
4 years ago
13

Which equation could be used to solve this problem? The number of items on two grocery lists differs by 9. The total number of i

tems for both lists is 33. How many items are on each list?
Mathematics
2 answers:
Rus_ich [418]4 years ago
8 0

Answer:

It's B.

Step-by-step explanation:

x + (x - 9) = 33

serg [7]4 years ago
7 0
X + y = 33
x - y = 9                          Add the 2 equations together
---------------
2x = 42                           Divide both sides by 2
x = 21

Use the original equation and plug 21 in for x, then solve.
x + y = 33
21 + y = 33
Subtract 21 from both sides
y = 12

One list had 21 items on it and the other list had 12 items on it.
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