rebecka050505 rebecka050505

13-12-2020
Mathematics

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What is ? : x - 9 = 0.7x + 0.6x

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Respuesta :

leontina1710 leontina1710

13-12-2020

Answer:

x= - 30

Step-by-step explanation:

x-9=0.7x+0.6

x-9=1.3x

x-9-1.3x=0

x-1.3x=9

x(1-1.3)=9

-0.3x=9

x= - 9/0.3

x= - 30

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