Please help! Find the value of x and the perimeter

For the triangle,

For the rectangle,

Step-by-step explanation:

To solve for x in these equations, we have treat each side as it's just one number - add them all up.

The perimeter of a triangle will be the sum of all 3 of its sides.

So:

We can combine like terms to get

Subtract 1 from both sides:

Divide both sides by 4:

For the rectangle, the perimeter is , so we can add up the sides.

Combine like terms:

Add 4 to both sides:

Divide both sides by 18:

Simplifying this fraction gets us

Hope this helped!

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