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17-03-2020
Mathematics

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How do you get a in the equation -0.4a+3=7

Respuesta :

Maddie20052024 Maddie20052024

09-11-2020

Answer:

A= -10

Step-by-step explanation:

-0.4a + 3 = 7

-4/10a + 3 = 7

-2^2/2*5a + 3 = 7

-2^2-1/5a + 3 = 7

-2/5a + 3 = 7

(-2a) + 5 * 3 / 5 = 7

-2a + 15 = 5 * 7

-2a + 15 = 35

-2a + 15 - 15 = 35 - 15

-2a = 20

2a/2 = -20/2

A= 2^2 * 5/ 2

A= -(2^2-1 * 5)

A= - (2*5)

A= -10

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