You can
put this solution on YOUR website!
We follow PE(MD)(AS) rules. We do just one thing and copy everything
else over.
20-[9-{7+(2*3)}+5]
The innermost parentheses is (2*3)
Replace only the (2*3) with 6 and copy everything else over.
20-[9-{7+6}+5]
Now the innermost parentheses is (7+6)
Replace only the (7+6) with 13 and copy everything else over.
20-[9-13+5]
Now the innermost parentheses is [9-13+5]. But it contains three
numbers to operate with. Do only the leftmost of the addition or
subtraction. That is, replace only the 9-13 with -4 and copy
everything else over.
20-[-4+5]
The innermost parentheses is [-4+5]
Replace only the [-4+5) with 1 and copy everything else over.
20-1
19.
Edwin
