The answer is 77.
Add then divide.
to add, you multiply... to subtract, you divide... weird, huh? haha!
you can add subtract multiply and divide them.
25. work backwards. take 37 ADD(instead of subtract) 13 to it. then take 50 and divide it by two.
... its of= X Each= divide
it can multiply,divide,add and subtract.
multiply divide answer subtract add
add muliply subtract and divide