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.

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asked Aug 12, 2017 185k views

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RuiDC · Answer 1 · 2017-08-18T01:59:13+0000

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

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.

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