Answer:

It's change of subject. :)
Answer:
4.2 or 4
Step-by-step explanation:
√18 = 4.24264068712
or 4.2
or 4
Answer:
x=-13 The solution is in the picture above. if you need more solutions let me know. :)
Answer:
17y-9x
Step-by-step explanation:
12y-6x+5y-3x
12y+5y-6x-3x
17y-9x