Yes she is correct! hope this helps
Divide both by a number that can go into both terms so it will be 5 .

which is 5(c-3)
48, multiply -1 by -4 then multiply 4 by 12
PEMDAS
Answer:
m = 2
Step-by-step explanation:
Given:
x = 4
y = 6m - 2
a = 8
b = 5
Required:
Value of m
SOLUTION:
x and y are segments of a chord divided when it intersects another chord that also has segments a and b.
According to the Intersecting chords theorem, 
Thus:

Solve for m





The value of m = 2