Linear function

Using one of the following forms x+p=q or px=q write an to represent these problems using x as the unknown variable

Larry ran 7 more miles than Barry in a month, if Larry ran 20 miles how many did Barry run?

please help its due tomorrow

Correct result:

B =  13 mi


L=7+B L=20 mi  B=L7=207=13 mi

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