Ok, this is fairly simple so all you have to do is plug in x in the equation for example 3 + 2x all you have to do is plug in the x in your case in the first column it'd be 3 + 2 x -4 which is -3
Answer: 0
Step-by-step explanation: First substitute 7 for x and y
7^3-7^3 = 0
Answer: It depends on you if it seems easier for you, you should try both and see which one works better for you.
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Step-by-step explanation:
hope this helps
Answer:
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Step-by-step explanation: