1) 6(7) + 7(9-x) = 2842 + 63 - 7x = 28105 - 7x = 28-7x = -77x = 11
Ответ: x = 11
2) 4.6 + 3.8x - 1.6 = 0.54.6 - 1.6 = 0.5 - 3.8x3 = -3.8xx = -3/3.8x = -0.79
Ответ: x = -0.79
1) 6(7) + 7(9-x) = 28
42 + 63 - 7x = 28
105 - 7x = 28
-7x = -77
x = 11
Ответ: x = 11
2) 4.6 + 3.8x - 1.6 = 0.5
4.6 - 1.6 = 0.5 - 3.8x
3 = -3.8x
x = -3/3.8
x = -0.79
Ответ: x = -0.79