Question

From the sum of 3x – y + 11 and -y – 11, subtract 3x – y – 11

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Answer 1

Answer:

Sum of 3x – y + 11 and -y – 11
= (3x – y + 11) + (-y – 11)
= 3x – y + 11 – y – 11
∴ 3x – 2y – (3x – 2y) – (3x – y – 11)
= 3x – 2y – 3x + y + 11
= 3x – 3x – 2y + y + 11
= -y + 11 is required solution

Answer 2

Answer:

Sum of 3x – y + 11 and -y – 11

= 3x + y - 22

Subtracting 3x - y - 11 from 3x + y -22

= xy