By increasing the number of federal hazardous waste sites in state a by 3 and then dividing by 3, the result is the number of federal hazardous waste sites in state b . find the number of federal hazardous waste sites in state a if there are 12 such sites in state b.

solve for A

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)