Answer:
m = 5
Explanation:
We know that c = c.
Since c is also equal to 30m+50 and 20m+100, 30m+50 = 20m+100 is just saying c = c. Then we solve that equation:
30m+50 = 20m+100
Same to both sides
10m = 50
divide by 10
m = 5
Let me know if you have any questions