Answer:

Step-by-step explanation:
We can solve the problem in this way:
- The 1st information that we have is that the four numbers are even and consecutive integer. Let's call these numbers A, B, C and D. This means that:

(since the distance between two even consecutive numbers is 2)
- The 2nd information that is given is that the sum of the first and third multiplied by 3 equals 28 less than 5 times the fourth, so:
(1)
Now we rewrite eq(1) by using:

and
(obtained by combining the 3 first equations)
So we get:

Solving this equation for C,

So the other numbers are:

No. It would multiply 8 times as much. The old volume is LWH, the new one would be 2L2W2H.
12. if you take half of 12, 6, then you add 5, you get 11.
8b+12-b=8+7b+4
7b+12=12+7b
-7b
7b-7b+12=12
-12 -12
0= 12-12
0=0
8.40/3 = £2.80 each
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