First and third, second can still be simplified.
Answer:
10 .
how i got this calculator
Answer:
14
Step-by-step explanation:
-3u = 4+5
-3u = 9
u = -3
7u + 7
7(u +1) = 7(-3+1)
7(-2)
14
Answer:
c=10
Step-by-step explanation:
Answer:
-1
Step-by-step explanation:

Hope this helps!