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Makovka662 [10]
3 years ago
14

I need help please and thank you!!

Mathematics
1 answer:
aliina [53]3 years ago
4 0

Hello and Good Morning/Afternoon

<u />

<u>Let's take this problem step-by-step</u>

<u />

<u>The Line DF is '5x + 7' cm long</u>

<u />

<u>The Line DF is made up of two lines DE and EF</u>

    ⇒ therefore

          DE + EF = \\    7 + 4x + 3 = 5x + 7\\10+4x=5x+7\\5x-4x=10-7\\x=3

<u>Let's plug x's value into '5x + 7'</u>

    \hookrightarrow DF = 5(3) +7=22

<u>Answer: 22cm</u>

<u></u>

Hope that helps!

#LearnwithBrainly

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