2 years ago

Plz help!! If DF = 170, find the value of x. Then find DE and EF.

Mathematics

2 answers:

Firlakuza [10]2 years ago

8 0

Answer

DE= 3x + 20 = 86
EF= 2x + 40=84

Step-by-step explanation:

DE: 3x + 20

EF: 2x + 40

DE+ EF= DF

3x+20 +2x + 40 = 170

5x + 60 =170

5x= 110

x= 22

DE= 3x + 20 = 86
EF= 2x + 40=84

Snowcat [4.5K]2 years ago

6 0

Answer:

x = 22

DE = 86

EF = 84

Step-by-step explanation:

DF=DE+EF

170= (3x +20) + ( 2x+40)

170 = 5x + 60

5x = 170 - 60

5x = 110

x = 110 / 5

x = 22

DE =3x + 20 = 3(22) + 20 = 66 + 20 = 86

EF= 2x + 40 = 2(22) + 40 = 44 + 40 = 84

I hope I helped you^_^

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