Respuesta :

Answer:

  • QR = 12

Step-by-step explanation:

We know that:

  • (3x - 3) + (x + 2) = 19

First, let's find the value of x.

Work:

  • (3x - 3) + (x + 2) = 19

Opening the brackets

  • => 3x - 3 + x + 2 = 19

Solving:

  • => 4x - 1 = 19
  • => 4x = 19 + 1
  • => 4x = 20

Dividing:

  • 4x = 20
  • => x = 20/4
  • => x = 5

Now, let's apply the value of x into the expression of QR.

  • 3x - 3
  • => 3(5) - 3
  • => 15 - 3
  • => 12

Since the question is just asking for the numerical value, the answer will just be 12.

Hence, the value of QR is 12.