Question

Example 1. Simplify :
(i) (x + 2y + 3z) + (2x + 3y – 2z)
(ii) (2x + 3y + 4z) - (x – 4y - 3z)
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Answer 1

Answer:

i) 3x + 5y + z

ii) x + 7y + 7z

Step-by-step explanation:

i) (x + 2y + 3z) + (2x + 3y – 2z)

= x + 2y + 3z + 2x + 3y - 2z

= (x+2x) + (2y+3y) + (3z-2z)

= 3x + 5y + z (Ans)

ii) (2x + 3y + 4z) - (x – 4y - 3z)

= 2x + 3y + 4z - x + 4y + 3z

= (2x - x) + (3y + 4y) + (4z + 3z)

= x + 7y + 7z (Ans)