Question

Решите уравнение.

a) 5(x + 1) + 6(x + 2) = 9(x + 3)​

Answer 1

Ответ:

$5( x+ 1) + 6(x + 2) = 9(x + 3) \\ 5x + 5 + 6x + 12 = 9x + 2 \\ 11x + 17 = 9x + 27 \\ 11x - 9x = 27 - 17 \\ 2x = 10 \\ x = 5$

Answer 2

Ответ:

5х+5+6х+12=9х+27

5х+6х-9х=27-12

2х=15|÷2

х=7,5