Question

If a + 7b + 4c = 2. what is 36c + 9a + 63b?

Answer 1

I got `18`

Explanation:

`36c+9a+63b=` collecting `9`:
`=9*(4c+a+7b)`
so it is `4` times the given `a+7b+4c` which in the definition is equal to `2`; so:
`=9*(4c+a+7b)=9*2=18`