r less than 164 is 248 more than the product of 216 and r

r less than 164 is 248 more than the product of 216 and r

r less than 164:
164 - r

The product of 216 and r:
216r

248 more than the product of 216 and r
216r + 248

The word is means an equation, so we set 164 - r equal to 216r + 248
164 - r = 216r + 248