The diagram shows an isosceles triangle. All the measurements are in cm.
3x – 5
19 – X
2x
Work out the perimeter of the triangle.​

-3.5

Step-by-step explanation:

3x + -5 + 19 + -1x + 2x = 0

Reorder the terms:

-5 + 19 + 3x + -1x + 2x = 0

Combine like terms: -5 + 19 = 14

14 + 3x + -1x + 2x = 0

Combine like terms: 3x + -1x = 2x

14 + 2x + 2x = 0

Combine like terms: 2x + 2x = 4x

14 + 4x = 0

Solving

14 + 4x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-14' to each side of the equation.

14 + -14 + 4x = 0 + -14

Combine like terms: 14 + -14 = 0

0 + 4x = 0 + -14

4x = 0 + -14

Combine like terms: 0 + -14 = -14

4x = -14

Divide each side by '4'.

x = -3.5

Simplifying

x = -3.5

I hope i helped, thanks UvU

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