Bob paid 3 less than Tim for his lunch at a local pizza parlor. Together they spent $7.80. How much did Bob spend for his lunch?
2007-12-17 02:23:41 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
3 times less or $3 less?
If 3 times less than
Bob = x
Tim = 3x
x+3x = 7.8
4x = 7.8
x =1.95
If $3 less than
Bob = x - 3
Tim = x
x + x - 3 = 7.8
2x - 3 = 7.8
2x = 10.8
x = 5.4
x - 3 = 2.4
2007-12-17 02:34:28 · answer #1 · answered by XxSyNd3rXx 2 · 0⤊ 0⤋
Bob=y
y + y + 3 = 7.8
2y +3 = 7.8
2y = 7.8 - 3
y = 4.8/2
y = 2.4
â´Bob spent $2.4.
2007-12-17 10:34:46 · answer #2 · answered by An ESL Learner 7 · 0⤊ 0⤋
suppose Bob paid x, so tim payed 3x
and x+3x=7.8
4x= 7.8
x=1.95 for Bob and 5.85 for Tim
2007-12-17 10:28:14 · answer #3 · answered by maussy 7 · 0⤊ 0⤋
if you mean 3cents less, the answer is $3.885
using the formula x +x + 0.03 = 7.80
if you mean $3 less, the answer is $2.40
using the formula x +x +3 = 7.80
where x is what bob spends.
cheers!
2007-12-17 10:32:19 · answer #4 · answered by M-Ann J 2 · 0⤊ 0⤋
2.4 $
2007-12-17 10:28:04 · answer #5 · answered by Kaaks 3 · 0⤊ 0⤋
idk
2007-12-17 10:36:30 · answer #6 · answered by Pageant girl<3 3 · 0⤊ 0⤋