which algebraic expression represents five times the sum of a number and six less than ten times that same number

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)

The answers are 20,30,80,180,960,890,1230,4560. on the first row