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prisoha [69]
3 years ago
6

When solving a system by substitution one should

Mathematics
1 answer:
Sophie [7]3 years ago
6 0
The answer is B my teacher told me.
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I would like help on this problem if anyone doesn't mind -(-4)+8
Snowcat [4.5K]
- (- 4) + 8 is the same as doing - 1(- 4) + 8 or - 1 x (- 4) + 8

Any negative times a negative becomes a positive so we just do 1 x 4 = 4. 

4 + 8 = 12. 

Your answer is 12. 
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