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3 years ago

I need the answers to numbers 18 and 20

Mathematics

2 answers:

ozzi3 years ago

8 0

See picture reply for the set up.

tigry1 [53]3 years ago

6 0

Answer:the answer is 22

Step-by-step explanation:

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maw [93]

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Which could be the first step in solving this system of equations by substitution?

Ainat [17]

Answer:

The first step is to replace the y in y-x=15 with 7x (we can do this because the first equation tells us that they're equal)

solve and get

(2.5,17.5)

or x= 2.5 y=17.5

Step-by-step explanation:

The first step is to recognize that y=7x which means that we can just replace the y in the second equation with 7x

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Answer:

See the attached

Step-by-step explanation:

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