subtract x-2y +3z from the sum of -3x+5y -2z and 2x -7y + 3z
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Answer:
2x + 2z
Step-by-step explanation:
[( -3x + 5y - 2z ) + ( 2x - 7y + 3z )] - ( x - 2y + 3z )
= [ -3x + 5y - 2z + 2x - 7y + 3z] - ( x - 2y + 3z )
= [ -3x + 2x - 7y + 5y - 2z + 3z ] - ( x - 2y + 3z )
= [ -x - 2y +z ] - ( x - 2y + 3z )
= -x - 2y + z - x + 2y - 3z
= -x - x + 2y - 2y + z - 3z
= 2x + 2z
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