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help me solve this math problem?
Each day, the number of births in the world exceeds the number of deaths by 229 thousand .
The combined number of births and deaths is 521 thousand.
Determine the number of births and the number of deaths per day.
how do i solve?
4 Answers
- mcq316Lv 71 decade agoFavourite answer
The total is 521,000
There are 229,000 MORE births than deaths.
X = number of deaths
X + 229,000 = number of births.
deaths + births = 521,000
X + (X+229,000) = 521000
2X + 229000 = 521000
Solve for X
- Anonymous1 decade ago
Let b be the births and let d be the deaths.
b + 229 = d
b + d = 521
Substitute the first equation into the second equation
b + (b + 229) = 521
2b = 292
b = 146
If b=146, then d = 146 + 229 = 375
- Jeff AaronLv 71 decade ago
b - d = 229,000
b + d = 521,000
Add those two equations:
2b = 750,000
b = 750,000/2
b = 375,000
Subtract the original two equations:
2d = 292,000
d = 292,000/2
d = 146,000