Supplementary angles with measures (2x+3) and (3x+2)

2x + 3 + 3x + 2 = 180
5x + 5 = 180
subtract 5 from both sides
5x = 175
divide both sides by 5
x = 35

2(35) + 3                           3(35) + 2
70 + 3 = 73 degrees        105 + 2 = 107 degrees

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)