Answer:
No solution.
Step-by-step explanation:
2x + y = 7
-2x - y = 6
From the first equation:
y = 7 - 2x
Plug this into the second equation:
-2x - (7 - 2x) = 6
-2x + 2x = 6 + 7
0 = 13
this doesn't make sense so theer is:
No solution.

so it's not symmetrical about the origin.
Answer:
$57
Step-by-step explanation:
$380x0.85=$323
$380-$323=$57
a cheap way to go about it is, let's do away with the denominators, and we'll do so by simply multiplying both sides by the the LCD of all fractions, in this case, that'd be "ab", so we multiply both sides by "ab".

Answer:
2
Step-by-step explanation:
Don't really know how to explain it. OmniCalculator is very helpful.
Hope that this helps!