a)
x - 2 - (3 + (7 - 2x)) = -6x - 2 - (3 + 7 - 2x) = -6x - 2 - 3 - 7 + 2x = -6x - 12 + 2x = -63x - 12 = -63x = -6 + 123x = 6x = 6/3x = 2
Ответ: x = 2
б)
1.6(5 - x) = 1.5(4 - x)8 - 1.6x = 6 - 1.5x-1.6x + 1.5x = 6 - 8-0.1x = -2x = -2 / -0.1x = 20
Ответ: x = 20
a)
x - 2 - (3 + (7 - 2x)) = -6
x - 2 - (3 + 7 - 2x) = -6
x - 2 - 3 - 7 + 2x = -6
x - 12 + 2x = -6
3x - 12 = -6
3x = -6 + 12
3x = 6
x = 6/3
x = 2
Ответ: x = 2
б)
1.6(5 - x) = 1.5(4 - x)
8 - 1.6x = 6 - 1.5x
-1.6x + 1.5x = 6 - 8
-0.1x = -2
x = -2 / -0.1
x = 20
Ответ: x = 20