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arsen [322]
4 years ago
15

3-(-5)-7

Mathematics
2 answers:
inessss [21]4 years ago
5 0

When Paolo tried to simplify 5 - 7 at Step 2, instead of keeping the sign of the answer, -2, he added it. He really should have written 3 - 2.

Lilit [14]4 years ago
5 0
Paolo should have multiplied 3 times positive 5 rather than adding it. The parenthesis means multiplication. :)
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