Question 618700
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Hi,
houses on the east side (having even house numbers) with numbers 122 through 182 are painted blue.
how many houses on the street are painted blue?
{{{a[n]=122+(n-1)*2 = 182}}}
           (n-1)*2 = 60
           2n-2 = 60
             2n = 62
              n = 31 houses painted blue