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The perimeter is 18in. Write an equation and use it to find the value of X.

The perimeter is 18in. Write an equation and use it to find the value of X.-example-1
User ElyashivLavi
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1 Answer

20 votes
20 votes

We need to find the x value.

The given figure is a rectangle and we have the perimeter when we sum all its sides.

So we have 4 sides which are x in, x in, 2 in and 2in and the sum has to be equal to 18in.

So P = x+x+2+2 = 18

Solve the equation for x

x+x+2+2 = 18

2x+4 = 18

subtract 4 on both sides

2x+4-4 = 18 -4

2x = 14

Divide by 2 into both sides

2x/2 = 14/2

x = 7

So 7 is the x value

Replace the x on the equation to confirm

x+x+2+2 = 18

7+7+2+2 = 18

14+4 = 18

The answer is correct.

User Tony Mathew
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2.9k points