12×10+15y=390
120+15y=390
15y=270
y=18
So 18 adult t-shirts were sold
I think the number would be 256 because
256 :
128*2
64*2
32*2
16*2
8*2
4*2
2*2
secondly if u divide 256 by 32 it gives 8 so it's a factor of 32
and lastly 2+5+6 = 13 which is an odd number
hope this helps!
Answer:
2
Step-by-step explanation:
solve the parentheses (6*3m)(6*5) so 18m +30 = 66, subtract 30 to both sides. 18m =36 and divide by 18 to both sides m=2
Answer:

Step-by-step explanation:
<em>Hey there!</em>
To simplify we need to combine like terms and use the communicative property,
34x + 6 = 1 + 13x
-13x to both sides
21x + 6 = 1
-6 to both sides
21x = -5
Divide both sides by 21
x = -5/21
<em>Hope this helps :)</em>