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<u><em>Answer:</em></u>
She bought 120 crackers
<u><em>Explanation:</em></u>
Assume that the number of crackers she originally bought was x
We know that she gave her neighbor 30% of the crackers.\This means that:
amount left with her = x - 30%x
amount left with her = x - 0.3 x
amount left with her = 0.7x crackers
Now, we know that she ate 50% of that amount.
This means that:
she ate 50%(0.7x) = 0.5(0.7x) = 0.35x crackers
amount left with her = 0.7x - 0.35x = 0.35x crackers
<u>Finally,</u> we know that the number of crackers left with her is 42 crackers.
<u>This means that:</u>
0.35x = 42
x =
x = 120 crackers
Hope this helps :)
She bought 120 crackers
<u><em>Explanation:</em></u>
Assume that the number of crackers she originally bought was x
We know that she gave her neighbor 30% of the crackers.\This means that:
amount left with her = x - 30%x
amount left with her = x - 0.3 x
amount left with her = 0.7x crackers
Now, we know that she ate 50% of that amount.
This means that:
she ate 50%(0.7x) = 0.5(0.7x) = 0.35x crackers
amount left with her = 0.7x - 0.35x = 0.35x crackers
<u>Finally,</u> we know that the number of crackers left with her is 42 crackers.
<u>This means that:</u>
0.35x = 42
x =
x = 120 crackers
Hope this helps :)