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Step-by-step explanation:
a) let no. be x
then, three times mean=3x
3x+11=56
3x=56-11
3x=45
x=45÷3
x=15
b) let no. be x
then, eight times mean= 8x
8x+42=32
8x=32-42
8x= -10
x=-10÷8
x= -1.28
Step-by-step explanation:
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