Please explain to me 6x+7(-9)=-50. we are solving for x how to you get x=2.2

We don't understand how they came up with the answer.

Do it one step at a time.

7 times -9 is -63
Now you have 6x - 63 = -50
Add 63 to both sides
Now it's 6x = 13
Divide both sides by 6
The result is x=2.16 whic rounds up to 2.2