Question

Afla x stiind k a-b=17 ;x-2a+2b=11 si 2b-2a+x=45

Answer 1

Răspuns:

Explicație pas cu pas:

a - b = 17

a) x - 2a + 2b = 11

x - 2 ( a - b ) = 11

x - 2 × 17 = 11

x - 34 = 11

x = 11 + 34

x = 45

___________________

b)

2 b - 2 a + x = 45

- 2 ( a - b ) + x = 45

- 2 × 17 + x = 45

- 34 + x = 45

x = 45 + 34

x = 79