Philip P. answered • 08/27/14

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Effective and Patient Math Tutor

1. L = W + 7

Perimeter = 50 = 2L + 2W

50 = 2(W+7) + 2W

50 = 2W + 14 + 2W

36 = 4W

**9 = W**

2. $Sweater = $Shirt + $3.95

3 $Shirts + 2 $Sweaters = $71.65

3 $Shirts + 2($Shirts + $3.95) = $71.65

5 $Shirts + $7.90 = $71.65

5 $Shirts = 63.75

**$Shirt = $12.75**

**$Sweater =**$Shirt + $3.95 =

**$16.70**

3. 3 $Shoes + 2 $Boots = $130

$Boots = $Shoes - $5

$Boots + $5 = $Shoes

3($Boots + $5) + 2 $Boots = $130

3 $Boots + $15 + 2 $Boots = $130

5 $Boots = $115

**$Boots = $23**