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I need help with this

I need help with this-example-1
User Tersrth
by
7.5k points

2 Answers

3 votes

Answer:

x = 16

Explanation:

Step 1: We know DF - DE = EF

9x - 39 - 47 = EF

Step 2: Simplify

9x - 86 = EF

Step 3: Set the equation equal to 3x + 10

9x - 86 = 3x + 10

6x = 96

x = 16

Therefore x is equal to 16

User Drulabs
by
8.4k points
1 vote

Answer:

58

Explanation:

DE + EF = DF

47+ 3x+10 = 9x-39

Combine like terms

57 +3x = 9x-39

Subtract 3x from each side

57+3x-3x = 9x-3x-39

57 = 6x-39

Add 39 to each side

57+39 = 6x-39+39

96 = 6x

Divide by 6

96/6 = 6x/6

16 =x

We want the length of EF

EF = 3x+10

= 3*16 +10

= 48+10

= 58

User Ryan Le
by
7.9k points

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