Answer:9 is the only one
Step-by-step explanation:
I would say that if the ones add up to 10 or more, they will regroup and put a 1 above the tens column to show the 10
Answer:
{y,x} = {7,-1}
Step-by-step explanation:
(-7x) + 3x = 4
- 4x = 4
4x = - 4
x = - 1
y = -7x
x = -1
y = -7(-1) = 7
