"Seven eighths of a number is 63." I need to show my work, but I don't know how to do this. PLZ help!

seven eights of a number = 7/8 × a number

let the unknown number be = x

it would be 6xy and -16xy.

false

step-by-step explanation:

the reason i say this is because for a certain length of sides you can pick any two and the length is wither equal or greater than the third side and in this case it's not.

3 + 5 = 8

8 is smaller than 9 which is the third side.

hope this : )