Let's evaluate left side first.
There are 4 -5's and 5 -3's
So that's 4(-5) + 5(-3) = -35
So now our equation is -35 = -5x
Now divide both sides by -5:
-35 / -5 = x
7 = x
So the missing number would be 7 to make this equation true.
Final answer: 7
Hope this helps.
