CBSE Class 7 Answered
From the sum of 3x - y + z and -y - z, subtract 3x - y - z.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
We have to find:
[(3x - y + z) + (-y - z)] - (3x - y - z)
= [3x - y + z - y - z] - (3x - y - z)
= (3x - 2y) - (3x - y - z)
= 3x - 2y - 3x + y + z
= 3x - 3x - 2y + y + z
= -y + z
[(3x - y + z) + (-y - z)] - (3x - y - z)
= [3x - y + z - y - z] - (3x - y - z)
= (3x - 2y) - (3x - y - z)
= 3x - 2y - 3x + y + z
= 3x - 3x - 2y + y + z
= -y + z
Answered by | 04 Jun, 2014, 03:23: PM
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