Answer:
7x - 7z + 3y + 10
Step-by-step explanation:
Hello,
|190-210|+|19-21|+x=100
==>|-20|+|-2|+x=100
==>20+2+x=100
==>x=100-22
==>x=78
Thus there is a mistake in your question !
You did the other numbers wrong, but it is very simple and all you have to do is pretend that there is 10 in each row
Hello there!

Explanation:
↓↓↓↓↓↓↓↓↓↓
First you had to add by 7 from both sides of the equation.

Simplify it should be the correct answer.

<u><em>Answer⇒⇒⇒⇒⇒⇒w=18</em></u>
Hope this helps!
Thank you for posting your question at here on Brainly.
Have a great day!
-Charlie
Answer:
x=0, x=3, x=5
Step-by-step explanation: