1) х * 8 = 11288 - 2920
8х = 8368
х = 8368 / 8
х = 1046
2) 2082 / 6 = х + 48
347 = х + 48
х = 347 - 48
<span> х = 299</span>
= 4х^2 - 20x + 2х - 10 - (4x^2 -10x + 4x - 10) =
= 4x^2 - 20x + 2x - 10 - 4x^2 + 10x - 4x + 10 =
= - 18x -10 + 6x + 10 = - 12x