Irene R. answered 08/11/20
BS in Mechanical Engineering and Certified math teacher for 13 years
Hi Saryah,
The correct order of operations is universal:
First: Evaluate expressions in parentheses
Second: Evaluate powers
Third: Complete multiplication or division in the order shown as you "read" from left to right
Fourth: Complete addition or subtraction in the order shown as you "read" from left to right
For the expression in your problem:
5(10+4)-42 =
5(14) - 42 =
5(14) - 16 =
70 - 16 = 54