Пошаговое объяснение:
а) 7 – 2х = 9 – 3х;
3x - 2x = 9 - 7
x = 2
б) 11х = 6 + 5(2х - 1);
11x = 6 + 10x - 5
11x - 10x = -5-6
x = -11
в) 6(2х - 3) – 3х = 2х – 4;
12x - 18 - 3x = 2x - 4
9x - 18 = 2x - 4
9x - 2x = 18 - 4
7x = 14
x = 14:7
г) 4(3х + 5) – 5(4х - 3) = 3.
12x + 20 - 20x + 15 = 3
-8x + 35 = 3
8x = 35-3
8x = 32
x = 32:8
x = 4
Пошаговое объяснение:
а) 7 – 2х = 9 – 3х;
3x - 2x = 9 - 7
x = 2
б) 11х = 6 + 5(2х - 1);
11x = 6 + 10x - 5
11x - 10x = -5-6
x = -11
в) 6(2х - 3) – 3х = 2х – 4;
12x - 18 - 3x = 2x - 4
9x - 18 = 2x - 4
9x - 2x = 18 - 4
7x = 14
x = 14:7
x = 2
г) 4(3х + 5) – 5(4х - 3) = 3.
12x + 20 - 20x + 15 = 3
-8x + 35 = 3
8x = 35-3
8x = 32
x = 32:8
x = 4