From the sum of 5p+10r and -r+11 subtract 5p-r-1
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1
Answer:
8r + 11
Step-by-step explanation:
we can write 5p +10 as 5p + 10r + 0.
⇒ 5p + 10r + 0
+ (-r) + 11
-------------------------------
5p + 9r + 11
-------------------------------
now, subtracting 5p - r - 1
⇒ 5p + 9r + 11
5p - r - 1
(-) (+) (+)
-----------------------------
8r + 12
-----------------------------
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