Kelly Builds 3 legged stools and 4 legged tables. Last month she used 72 legs to build 3 more stools than tables. How many stools and tables did she make?
I have the answer using pictures but i have to use equations as showing my work! How do i make that into an Equation??
Plzzz help mee! :-D
2007-03-01 10:39:57 · 4 answers · asked by jesald15 1 in Education & Reference ➔ Homework Help
3x + 4y= 72
x = y + 3
where X = number of stools and Y= tables
3(y+3) +4 (y) = 72 (substitution for x)
3y +9 +4y =72 (simplifying)
7y= 72-9 (more simplyfing)
7y= 63
y=9 tables insert into orig. equation
x= 9+3
x= 12 stools ta da.....!
2007-03-01 10:49:25 · answer #1 · answered by ca_surveyor 7 · 0⤊ 0⤋
72-3x3=63
63/7 for each one stool and table=9
Kelly built 9 tables and 12 stools
check: 9x4=36 legs
12x3=36
36+36=72 legs
2007-03-01 18:52:36 · answer #2 · answered by Janet 3 · 0⤊ 0⤋
3x+4y=72 and y=x-3 its a system of equations let x mean stools & y mean tables
2007-03-01 18:47:37 · answer #3 · answered by swimdudensc 2 · 0⤊ 0⤋
i suggest u go to sparknotes.com and click on math or go to claytonpl.org and click on homework helpline
2007-03-01 18:49:31 · answer #4 · answered by jas1102 2 · 0⤊ 0⤋