15% means 0.15 .
'of' means 'times'.
The problem is (0.15) x (63.2) .
I think you can take over and do it from there.
Answer:
18
Step-by-step explanation:
a + 7b + 4c = 2,
Multiply this equation by 9
9( a + 7b + 4c) = 2*9
9a + 63b +36c = 18
Rearrange the order
36c +9a +63b = 18
