Answer:
and
the mistake was in calculating
let's solve first.
Explanation:
if
, substitute the
in the equation
as
solve the equation in parentheses :
multiply
by
it will equal to:
now we want to let all unknown digits alone, so we will take
to the other side with a different sign it will be as:
now we will solve it:
at this part, the given equation was wrong in the paper.
we don't want the digit to be negative so we will do it like this:
now that we found
we will substitute it to find
:
overall the mistake was in calculating
instead of putting
he/she put a different sign in front of the digit like :
so when he/she flipped
it became positive and instead of subtracting he/she added it.