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04-10-2020
Mathematics

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If A= 2x -7y+5z-7, B=y +7 z +5 and C= 3y +2 z -5 x, find A + B – C.

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taaaaan taaaaan

04-10-2020

Answer:

-3x-9y+14z-2

Step-by-step explanation:

a= 2x-7y+5z-7

b= y+7z+5

c= 3y+2z-5x

a+b

2x-7y+5z-7+y+7z+5

2x-6y+12z-2 - c

2x-6y+12z-2 - c

2x-6y+12z-2-3y+2z-5x

-3x-9y+14z-2

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