Question

varog ajutati 3(x-1)=5x+2 si 9-4(5x-1)=2-6(7-8x)​

Answer 1

Răspuns:

Vezi dacă te ajuta,

îmi zici

Answer 2

3 ( x - 1 ) = 5 x + 2

3 x - 3 = 5 x + 2

3 x - 5 x = 2 + 3

- 2 x = 5 | : 2

- x = 2, 5 | × ( - 1 )

x = - 2, 5

9 - 4 ( 5 x - 1 ) = 2 - 6 ( 7 - 8 x )

9 - 20 x + 4 = 2 - 42 + 48 x

- 20 x - 48 x = 2 - 42 - 4 - 9

- 68 x = - 40 - 4 - 9

- 68 x = - 44 - 9

- 68 x = - 53 | : 68

- x = - 53 / 68 | × ( - 1 )

x = 53 / 68