When can you add or subtract equations in a system to solve the system? when do you have to multiply first? justify your answers with examples.

You must always use the order of operations also known as PEMDAS meaning multiplication and division come before adding and subtracting for example when solving 2+2÷2 if not follwing PEMDAS it is 2 When you do it the correct way using PEMDAS it will be 3

.023
.037

If you need them added, it is .060