How much is x – 2y + 3z greater than 3x + 5y – 7?

1.	How much is x – 2y + 3z greater than 3x + 5y – 7?
Answer» By subtracting x – 2y + 3z from 3x + 5y – 7 we can get the required expression, Required expression = (x – 2y + 3z) – (3x + 5y – 7) = x – 2y + 3z – 3x – 5y + 7 Collecting positive and negative like terms together, we get = x – 3x – 2y + 5y + 3z + 7 = –2x – 7y + 3z + 7

Answer»

By subtracting x – 2y + 3z from 3x + 5y – 7 we can get the required expression,

Required expression = (x – 2y + 3z) – (3x + 5y – 7)

= x – 2y + 3z – 3x – 5y + 7

Collecting positive and negative like terms together, we get

= x – 3x – 2y + 5y + 3z + 7

= –2x – 7y + 3z + 7

Discussion