Question

12)b) 3x+10 supra 5x-8 = 11 supra 6 . c) 35-4x supra 20-3x =3​

Answer 1

Răspuns:

Explicație pas cu pas:

b)

( 3x+10)/(5x-8) = 11/6

11(5x-8) = 6(3x+10)

55 x - 88 = 18 x + 60

55 x - 18 x = 60 + 88

37 x = 148

x = 148 : 37

x = 4

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c)

( 35 - 4 x ) / ( 20 - 3 x ) = 3

3 ( 20 - 3 x ) = 35 - 4 x

60 - 9 x = 35 - 4 x

- 9 x + 4 x = 35 - 60

- 5 x = - 25

x = ( - 25 ) : ( - 5)

x = 5