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MakcuM [25]
3 years ago
10

What is the first step to solve the following system of equations using substitution?I'm x−y=72

Mathematics
2 answers:
juin [17]3 years ago
6 0

Answer: solve the first equation for x

Step-by-step explanation:

azamat3 years ago
3 0

Answer:

well how you put it together but the answer will b 2x-2y=89

Step-by-step explanation:

you have 2 x and 2 y and then 72 and 17

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Multiply: (4x – 7)(2x – 9)
harina [27]
Hello there!


Let's use foil.

First: 4x * 2x = 8x^2

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Now, let's combine these.

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I hope I helped!

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- Then minus 13 from 27 (since we're solving for how old Penelope was 13 years ago), which gives you 14

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