Question

How do you solve this?

Answer 1

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`\large\blue\textsf{\textbf{\underline{\underline{Question:-}}}}`

How do you solve this? [question in attachment]

`\large\blue\textsf{\textbf{\underline{\underline{Answer and How to Solve:-}}}}`

In order to find the perimeter of a shape, we should add all of its sides.

Since a triangle has only 3 sides, we add 3 sides together, like so:-

⇒ 9x-7+12x-13+3x+8

Combine like terms:-

➪ 9x+12x+3x-7-13-8

Which simplifies to

➪9x+15x-7-21

On further simplification,

➪24x-28

So we conclude that the perimeter of the triangle is 24x-28 units.

Good luck.

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