Question

What should be added to 7a-9b+13cto get 9a+b-c​

Answer 1

Answer:

7a-9b+13c+x= 9a+b-c​

x= 9a+b-c​+7a-9b+13c

 =9a+7a+b-9b-c+13c

 =16a-8b+12c

Your answer is 16a-8b+12c

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Answer 2

Answer:

here is your answer. please mark me as brainliest ☺️