@kingtundedunnt Apply BODMAS - BRACKET OF DIVISION, MULTIPLICATION, ADDITION AND SUBTRACTION.
APPLYING BODMAS - YOU SEE THAT DIVISION FIRST, FOLLOWED BY MULTIPLICATION AND THEN LASTLY SUBTRACTION
80 - 40 ÷ 10 × 4=
40 ÷ 10 = 4
THEN WE HAVE
80 - 4 × 4=
Next is 4 × 4 = 16
80 - 16 = 64 ANSWER