Subtract the sum a-b + c from 2 a +b- C
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a+2b-2c
Step-by-step explanation:
2a+b-c -(a-b+c)
2a+b-c-a+b-c ( the sign will be change)
2a-a+b+b-c-c. ( collect the like terms)
a+2b-2c is the answer
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