Question

15. The perimeter of a triangle is 5 - 3x + 7x and two of its sides are 2x2 + 3x – 2 and
3r-x+ 3. Find the third side of the triangle.​

Answer 1

Step-by-step explanation:

Perimeter=s1+s2+s3

5-3x+7x=2*2+3x-2+3x-x+3+s2

5-3x+7x=4-2+3+3x-x+3x+s2

5-3x+7x=5+2x+3x+s2

5+4x=5+5x+s2

5-5=5x-4x+s2

0=x+s2

-x=s2

Answer 2

Step-by-step explanation:

-x=s2 — is the answer and explain explained above