In a triangle abc, ab: bc is 5: 9. on the triangle ab=15 and bc=5x+2. write a proportion and solve for the variable

If AB is 15, then BC is 15*9/5=27.  Therefore, we can write the equation 5x+2=27.

We subtract by 2 to find that 5x=25, and divide by 5 to see that x=5.

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)