linear equations
Homework Answers
s = shirt
p = pants
therefore,
1)s + p = 14
s = 14 - p
2) $11.99 s + $24.99 p = $245.86
substitute in s from #1
[$11.99 (14 - p)] + $24.99 p = $245.86
166.60 - 11.99 p + 24.99 p = 245.86
166.6 + 13 p = 245.86
13 p = 79.26
p = 6.09≈ 6 because you can't have 6.1 of a pants
plug back into #1 formula
s + p = 14
s + 6 = 14
s = 8
so you have 6 pants and 8 shirts.
y-pants:
(1) x+y=14
(2) 11.99x+24.99y=245.86
2 equations with 2 variables:
x=8 -- 8 shirts
y=6 -- 6 pants
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