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pogonyaev
3 years ago
7

I need help with the equation inserted in the picture.

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
4 0

Answer:

x = 4

-4x+21 => 5

Step-by-step explanation:

The given triangle in the picture is isosceles triangle which means that two sides of the triangle are equal.

So,

Side\ 1: -4x+21\\Side\ 2: -4x+21\\Side\ 3: 6\\Perimeter = 16

Now

Putting all the values in equation for perimeter

Side\ 1+Side\ 2+Side\ 3 = 16\\-4x+21 -4x+21 + 6 =16\\-8x +48 = 16\\-8x = 16-48\\-8x = -32\\\frac{-8x}{-8} = \frac{-32}{-8}\\x = 4

Putting x = 4 in side 1

=-4(4)+21\\= -16+21\\=5

Hence,

x = 4

-4x+21 => 5

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