3 years ago

How can 9+3 =12 help you solve 12-9?

Mathematics

2 answers:

Dovator [93]3 years ago

7 0

9+3=12, 12-9=3, since those three numbers are in the first equation.

d1i1m1o1n [39]3 years ago

3 0

Well you know that 9+3=12 so you can reverse it and do 12-9=3 .Because 3 is the only one left in the equation of 9+3=12.

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So, if factor 10^-4 on the right side, we have

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