Question

BC=40 CD=30 what is the value of BC-AC

Answer 1

40-10A

Explanation:

So id BxC=40 and CxD=30, C is divisible by both 40 and 30 and saying that they are all whole numbers, C=10,B=4, and D=3.

So BC-AC=40-10A, since we don't know the value of A.