Meg paid $9 for two tuna sandwiches. At the same rate, how much does Meg pay for 8 tuna sandwiches?
1 answer:
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Expand the right side:
Notice that 98 = 2 * 7 * 7, so we have and
.
Then
and
Expand the right side:
Notice that 98 = 2 * 7 * 7, so we have and
.
Then
and