Question

1.2(a+b)+1,2(a+b)-a=b cpoчно​

Answer 1

Объяснение:

$1.2(a + b) + 1.2(a + b) - a = b \\ 1.2a + 1.2b + 1.2a + 1.2b - a = b \\ 1.4a + 2.4b = b \\ 1.4a = b - 2.4b \\ 1.4a = - 1.4b \\ a = - b$