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OpenStudy (anonymous):
subtract (-2a+9b-c)-(-9b+9c-6d)
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OpenStudy (anonymous):
-2a+18b-10c+6d
OpenStudy (anonymous):
(-2A+9B-C)-(-9B+9C-6D) ;OPENING BRACKETS, -2A+9B-C+9B-9C+6D ;ARRANGING, -2A+9B+9B-C-9C+6D ;SOLVING, -2A+18B-10C+6D : ANSWER !!! ;YOU CAN ALSO TAKE COMMON FROM THE ANSWER, 2(-A+9B-5C+3D) IT IS ALSO THE ANSWER
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