Math, asked by hellipittu, 5 hours ago

answer 3 rd one please fast

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Answered by aliabidi09

1

Answer:

Step-by-step explanation:

Sum = x + 3y + ( - 3x - y )

Sum = x - 3x + 3 y - y

Sum = -2x + 2y

Now Subtracting f

= -2x + 2y - ( x - y )

= -2x + 2y - x + y

= -2x - x + 2y + y

= -3x + 3y

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