If the population of a town grew by 10% when 120 people moved
to town in one year. What was the population of the town before
the people moved there?
2006-10-05 12:50:55 · 6 answers · asked by adamoca@sbcglobal.net 1 in Politics & Government ➔ Other - Politics & Government
1200
2006-10-05 12:57:54 · answer #1 · answered by Charlie 2 · 0⤊ 0⤋
if 10%=120, then 10 x 120 should equal the population, which would be 1200....try and build an equation from that
2006-10-05 19:54:17 · answer #2 · answered by Jimmy6 2 · 0⤊ 0⤋
The formula is
10 120
---- ------
100 x
You want to cross multiply > 120 x 100 = 12000
then divide by 10 > 1200 is the answer.
2006-10-05 20:04:38 · answer #3 · answered by i_luv_kitties 1 · 0⤊ 0⤋
Let population of town before 120 people moved there = p
Let y=population of town now
y=p+120
p+120 (substitute for y) =.10 p +p
(multiply each side by .10) 10p+1200=p+10p
(subtract 10p from each side) p=1200
2006-10-05 20:02:57 · answer #4 · answered by Anonymous · 0⤊ 0⤋
120 = 10%*P
P = 120/10% = 120/(10/100) = 120*100/10
2006-10-05 19:58:06 · answer #5 · answered by Helmut 7 · 0⤊ 0⤋
0.10 * P = 120
P = 1200
2006-10-05 19:54:04 · answer #6 · answered by Steve P 5 · 0⤊ 0⤋