Question

реши уравнение ×+90=860×400

Answer 1

Х=860×400-90
Х=344 000-90
Х=343 310

Answer 2

$x + 90 = 344000$
$x = 344000 - 90$
$x = 343910$
--------------------------------------------
$343910 + 90 = 344000$
$344000 = 344000$