Question

ALGEBRA
SIMPLIFY
STEP BY STEP SOLUTION
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Answer 1

Bar is like a bracket...first we solve bar bracket..so here-and- will be+ so the answer is not-z but+z .Hope you understand and next solution will be..

-x-[-y+{z-(x-y+z)}]

-x-[-y+{z-x+y-z}]

-x-[-y+z-x+y-z]

-x+y-z+x-y+z

All will cut...so the answer is 0

hope it helps