Объяснение:
714. x + x/10 = -11/2 | ×20
20x +2x = -110
22x = -110
x = -110/22
x = -5
754. (x-6)² = (x+7)²
(x-6)² - (x+7)² = 0
(x-6-x-7)(x-6+x+7)=0
-13(2x + 1)=0
-26x - 13 = 0
-26x =13
x = 13/(-26)
x = -0.5
Объяснение:
714. x + x/10 = -11/2 | ×20
20x +2x = -110
22x = -110
x = -110/22
x = -5
754. (x-6)² = (x+7)²
(x-6)² - (x+7)² = 0
(x-6-x-7)(x-6+x+7)=0
-13(2x + 1)=0
-26x - 13 = 0
-26x =13
x = 13/(-26)
x = -0.5