The number 15 has 2 place values.
The value in the tens place is 1.
The value in the ones place is 5.
1 tens + 5 ones = 15
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If you debit one side you have to debit the other. what you do to one side you must do to the other.
Answer:
its D!
Step-by-step explanation:
if you plug 3 into x for any of the equations, only the last one equals 1, so its the only one that works :)