3 years ago

NEED ANSWER ASAP PLEASE!!

Mathematics

1 answer:

erastova [34]3 years ago

6 0

Answer:

DE=5*8=40

Step-by-step explanation:

DE+EF=DF

5x+17x-20=20x-4

22x-20=20x-4

22x-20x=-4+20

2x=16

x=16/2

x=8

DE=5x

DE=5*8=40

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