please tell me answer ?!
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Answer:
P+Q+R equals too 0
Step-by-step explanation:
P=2a-5b-7c..........[(1)]
Q=9b-6a-10c..........[(2)]
R=17c-4b+4a...........[(3)]
Now add the three equations[1+2+3] equation
P+Q+R=2a-5b-7c
+[-6a+9b-10c]
+[4a-4b+17c]
=> 2a-5b-7c
=> -6a+9b-10c
=> 4a-4b+17c
=> 0a-0b-0c
=>0
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