A.because -18 changes into positive and that would make it 18 + 12=30 and you divided it by -3x which should have x equal to -10
Answer:
It would be 68,70,72
Step-by-step explanation:
The sum of first and third of 3 consecutive number is 140 as 68+72 is 140.
68 is the first
72 is the third
They are all even numbers as well
Answer:

Step-by-step explanation:
Hope this helps!
=)
Answer:
The coordinates of the intersection point are 
Step-by-step explanation:
we have
-----> equation A
-----> equation B
-----> equation C
we know that
If the system of equations intersect at one point, then the system of equations has one solution
using a graphing tool
see the attached figure
The coordinates of the intersection point are 
This point is a common solution for the three equations
Verify
Substitute the value of
in each equation
so
Equation A

----> is true, therefore the point is a solution of the equation A
Equation B


----> is true, therefore the point is a solution of the equation B
Equation C

----> is true, therefore the point is a solution of the equation C