Respuesta :

clara92
First write an equation:
7x - 1 + 2x - 1 = 7

Simplify:
9x - 2 = 7

Add two:
9x = 9

Divide both sides by 9:

x = 1

Answer:

x = 1

Step-by-step explanation:

Hello !

RS + ST = RT

7x - 1 + 2x - 1 = 7

9x = 7 + 1 + 1

9x = 9

x = 9 : 9

x = 1

Good luck !

Al3xis