tonaieeaster tonaieeaster

21-09-2020
Mathematics

contestada

if DE = 7x + 3 and EF = 9x - 19,
then EF = ?

Respuesta :

meredith48034 meredith48034

21-09-2020

Answer:

Step-by-step explanation:

7x + 3 = 9x - 19

-2x + 3 = -19

-2x = -22

x = 11

DE= 7(11) + 3 = 77 + 3 = 80

EF = 9(11) - 19 = 99 - 19 = 80

80 + 80 = 160 for DF

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