Розв'яжіть рівняння: 1) 10 - (7 - 4x-x) = x + 8x - 9; 2) (5х1 - 3)-(2x+5) - 5x; 3) 6 + х - (2x - 9 + х) = 5; V4) 12 - (6-9x-x)=x 45x -14.
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Пошаговое объяснение:
10 - (7 - 4х - х) = х + 8х - 9
10 - (7 - 5х) = 9х - 9
10 - 7 + 5х = 9х - 9
3 + 5х = 9х - 9
5х - 9х = -9 - 3
-4х = -12
х = -12 : (-4)
х = 3
6 + х - (2х - 9 + х) = 5
6 + х - 2х + 9 - х = 5
15 - 2х = 5
-2х = 5 - 15
-2х = -10
х = -10 : (-2)
х = 5
12 - (6 - 9х - х) = х
12 - (6 - 10х) = х
12 - 6 + 10х = х
6 + 10х = х
10х - х = -6
9х = -6
х = -6/9
х = -2/3