1) -4.2x + 1.1 = -11.5-4.2x = -11.5 - 1.1-4.2x = -12.6x = -12.6 / -4.2x = 3
2) -6.5x + 2.8 = -10.2-6.5x = -10.2 - 2.8-6.5x = -13x = -13 / -6.5x = 2
3) 6 * (5x - 35.6) = -3.630x - 213.6 = -3.630x = 210x = 210 / 30x = 7
4) 3 * (2x - 16.6) = 4.26x - 49.8 = 4.26x = 54x = 54 / 6x = 9
Ответ: x = 3, x = 2, x = 7, x = 9.
1) -4.2x + 1.1 = -11.5
-4.2x = -11.5 - 1.1
-4.2x = -12.6
x = -12.6 / -4.2
x = 3
2) -6.5x + 2.8 = -10.2
-6.5x = -10.2 - 2.8
-6.5x = -13
x = -13 / -6.5
x = 2
3) 6 * (5x - 35.6) = -3.6
30x - 213.6 = -3.6
30x = 210
x = 210 / 30
x = 7
4) 3 * (2x - 16.6) = 4.2
6x - 49.8 = 4.2
6x = 54
x = 54 / 6
x = 9
Ответ: x = 3, x = 2, x = 7, x = 9.