Subtract the sum of 3p + 2q – 9r - 7, - 5p + 4q – 6r – 4 and
4p – q +5 r - 2 from the sum of 7p – 2q + 3r - 5 and 5p - 7q – r + 3
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8p+6q-3r -11
Step-by-step explanation:
3p+2q-9r-7
4p+4q-6r-4
+ - - +
8p-6q-3r+ 11
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