The seven is in the ones place because its the only number there
Add 3 to isolate y
3.8 + 3.8 = 1.9z - 3.8 + 3.8
7.6 = 1.9z
Divide by 1.9
4 = z
These can be some values of equation
6x+ 12=30
This question might not get the right answer but this how you set equations.
Answer and work down below. Let me know if you have any questions
I think they all are right are you not confident about one ...? I can explain it to you
