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IrinaVladis [17]
3 years ago
14

My brain hurts trying to solve this. Im pretty sure x = 42 but im not sure about the equation.

Mathematics
2 answers:
SVEN [57.7K]3 years ago
6 0
<h2>Answer:</h2><h2>x+12 = 30</h2><h2>x = 18 students</h2><h2>Step-by-step explanation:</h2>

mart [117]3 years ago
6 0

Answer:

<em>x + 12 = 30 \\ x = 30 - 12 \\  \timex \\ x = 18</em>

<em>1</em><em>8</em><em> </em><em>students</em><em> </em><em />

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the length of a rectangle is 7 inches more than its width, if the perimiter of the rectangle is 66 inches, find its dimensions.
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Perimeter of rectangle=66
length of rectangle=L
width of rectangle=w
P of a rect.= 2(length)+ 2(width)
66= 2L+2w

if the length is 7in more than the width, then
L=7+w

Now we will substitute 7+w in for L. Here is our new equation:

66=2(7+w) + 2w

Solve for w

66=14+2w+2w
66=14+4w
52=4w
w=13
L=7+13, so L=20

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