Answer:
It is C I am good at math
Step-by-step explanation:
1 and 2
2+1=3
2×5=10
1×4=4
10-4=6
No
2 by 7 + – is equals to 1 so we can say that x.
x=1-2/7
x=7/7-2/7
x=5/7
x = 0