Answer:
A
Step-by-step explanation:
Everything else is false and A is correct because the sum of two opposites equal 0.
Answer:
f(-)=29/11
Step-by-step explanation:
Even though you don't want an explanation, I'll just tell you the basics lol.
So what you have to do, is plug in -7 for the x's.
it should look something like the equation below.

After that all you need to is just to subtract :)

Then after that all you need to do is just let the negatives cancel out each other so you should get:

Hope this helps!
54 is th answer because ther is 6 units on one side and 9 units in the other and when you times you get this I think
Answer:
x=10
Step-by-step explanation:
7x+70=16x-20
70=9x-20
9x=90
x=10