Can you tell me how to solve this.

the largest side of a triangle is six more units than the smallest side. the third side is twice the smallest
side. if the perimeter of the triangle
is 25 units, write and solve an equation to find the lengths of all three sides
of the triangle.

First you should ask how you can express each side in terms of the smallest. Let the smallest side equal x. Because the second side is 6 more than the smallest, you can write it as x + 6. The third side is twice the size of the smallest, so you can call it 2x.

All of these sides add up to equal 25 units, so you can write the equation

x + x + 6 +2x = 25

From there, you can add like terms, solve for x, and plug it in to solve for the lengths of the other sides. Lmk if you have any more issues.