if the population increase in a single day is 214 thousand, determine the number of births and deaths per day

Question

each day the number of births in the world is 92 thousand less than three times the number of deaths. if the population increase in a single day is 214 thousand, determine the number of births and deaths per day

Answer 1

Let B = the number of births each day and let D = the number of deaths.

 

B = 3D - 92,000      The number of births is 92 thousand less than three times the number of deaths

 

214,000 = B - D      The population increase in a single day is 214 thousand

So 214,000 + D = B

 

B = 3D - 92,000

 

Substitute 214,000 + D in place of B, solve for D:

214,000 + D = 3D - 92,000

214,000 + 92,000 = 3D - D

306,000 = 2D

 

153,000 = D

 

Solve for B:

214,000 + D = B

214,000 + 153,000 = B

 

367,000 = B

 

Check:

B = 3D - 92,000

B = 3(153,000) - 92,000

B = 459,000 - 92,000

B = 367,000

CHECK!