Explain the order of operations plz!

The order of operations is an acronym that helps the solver with trying to solve a question. Order of operations is usually known as "PEMDAS", which stands for:

Parenthesis: The first step you take, generally, there are two types of "parenthesis" you may see, Parenthesis "(" ")", and Brackets "[" "]". Brackets are rarely used unless you need a parenthesis within a parenthesis.

For example: [10(5 + 18)], in which you first solve the parenthesis: (5 + 18) = (23), and then the brackets: [(10)(23)] = 230

Exponent (& Roots): This is the next step you take. You solve any exponents (numbers with powers, for example: 15² or 18^2).

An example can be seen in (3)² + 8, in which you solve the exponent, and then the addition: 3² = 9; 9 + 8 = 17

Multiplication: The third step, in which you solve the multiplications inside the expression. For example: 18(x + 7)

(As you cannot combine a variable and a number), you must continue on to the next step (multiplication). Distribute 18 to all terms within the parenthesis:

18(x + 7) = 18(x) + 18(7) = 18x + 126

Division: The fourth step, (however, it is interchangeable with multiplication. Remember that you should follow the left -> right rule after Parenthesis & Exponents). For example: (x + 12)/12

Distribute "divide by 12" to all terms within the parenthesis: (x + 12)/12 = x/12 + 12/12. Simplify. x/12 + 12/12 = x/12 + 1

Addition: The second to last step, in which you combine any like terms that you can (still following the left -> right rule).

Subtraction: The last step, in which you combine any like terms that you can (still following the left -> right rule).

For example:

5 - 2 * 3 + 9

In the following order of operation, we see 3 operations: Subtract, Multiply, and Add. Remembering PEMDAS, we will solve this question.

First, multiply: 2 * 3 = 6

Next, following the left -> right rule, we will subtract: 5 - 6 = -1

Finally, add: -1 + 9 = 8

8 would be the answer for this example.

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answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.

24+x=y

step-by-step explanation: